Patents Assigned to Egyt Gyogyszervegyeszeti Gyar
  • Patent number: 4423044
    Abstract: The invention relates to new 3,4-dihydro-5H-2,3-benzodiazepine derivatives of general formula (I) and pharmaceutically acceptable acid addition salts thereof, ##STR1## wherein R represents a phenyl group optionally carrying one or two substituents selected from the group consisting of halogen, hydroxy, C.sub.1-4 alkoxy and benzyloxy; a furyl or a thienyl group,R.sup.1 stands for a hydrogen atom or a C.sub.1-4 alkyl group,R.sup.2 and R.sup.3 each represent hydrogen atom, C.sub.1-4 alkoxy, C.sub.4-7 cycloalkoxy or benzyloxy group.The new compounds of the general formula (I) can be prepared by reducing a 5H-2,3-benzodiazepine derivative of the general formula (II) ##STR2## wherein R, R.sup.1, R.sup.2 and R.sup.3 have the above-defined meanings, with an inorganic or organic hydride and/or complex metal hydride.The new compounds of the general formula (I) possess significant central nervous effects and can advantageously be used in the therapy.
    Type: Grant
    Filed: February 25, 1982
    Date of Patent: December 27, 1983
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Jeno Korosi, Tibor Lang, Ferene Andrasi, Jozsef Szekely, Tamas Hamori, Tibor Balogh, Lajos Ila, Katalin Goldschmidt, Eleonora Sineger, Imre Moravcsik
  • Patent number: 4419355
    Abstract: The invention relates to new condensed as-triazine derivatives of the general formula (I) ##STR1## wherein Z represents a buta-1,3-dienyl group or a group of the formula (a), (b), (c) or (d) ##STR2## R.sub.1 denotes a C.sub.1-10 alkyl group, an oxo group or a C.sub.6-10 aryl or C.sub.6-10 aryl-(C.sub.1-3 alkyl) group optionally substituted by one or more identical or different substituents selected from the group consisting of amino, nitro, C.sub.1-6 alkyl, C.sub.1-6 alkoxy, hydroxy and halogen,R.sub.2 stands for hydrogen, C.sub.1-10 alkyl or amino,R.sub.3 represents hydrogen, C.sub.1-10 alkyl or C.sub.6-10 aryl or C.sub.6-10 aryl-(C.sub.1-3 alkyl) optionally substituted by one or more identical or different substituents selected from the group consisting of nitro, amino, C.sub.1-6 alkyl, C.sub.1-6 alkoxy, hydroxy and halogen,X.sup.- denotes an anion, andn is 0 or 1,with the proviso that if n is O, R.sub.1 is other than an oxo group and R.sub.1 ' and R.sub.
    Type: Grant
    Filed: July 16, 1981
    Date of Patent: December 6, 1983
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Ibolya Kosoczky, Eva Toncsev, nee Ravasz, Pal Benko, Laszlo Pallos, Lujza Petocz, Sandor Batori, Gyorgy Hajos, Andras Messmer, Katalin Grasser
  • Patent number: 4409219
    Abstract: The invention relates to new quinoxaline-1,4-derivatives of the general formula (I) and biologically acceptable salts thereof, ##STR1## wherein Q is a hydrogen atom or a methyl group,R.sub.1 represents a hydrogen atom, a cyano, lower alkanoyl or nitro group or a halogen atom,R.sub.2 stands for cyano, lower alkanoyl, or a group of the general formula --COOR.sub.3, --CONR.sub.4 R.sub.5 or --CO--NH--NR.sub.4 R.sub.5, andR.sub.3 represents a hydrogen atom or a C.sub.1-18 alkyl, C.sub.6-12 aryl or C.sub.6-10 aryl-(C.sub.1-14 alkyl) group optionally substituted by a halogen atom or a hydroxy group, whereby the aromatic ring of the said groups may optionally contain 1-3 identical or different substituents selected from the group consisting of lower alkyl or alkoxy, amino, nitro, halogen and/or hydroxy,R.sub.4 is a hydrogen atom or a C.sub.1-18 alkyl, a lower alkenyl, a lower alkynyl, a lower cycloalkyl, C.sub.6-10 aryl, C.sub.6-10 aryl-(C.sub.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: October 11, 1983
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Pal Benko, Daniel Bozsing, Jamos Gundel, Karoly Magyar
  • Patent number: 4395413
    Abstract: The invention relates to novel oxime ethers of the general formula /I/ and acid addition salts and quaternary ammonium derivatives thereof, ##STR1## wherein A represents a C.sub.2-6 straight or branched alkylene chain,R and R.sup.1 each represent a C.sub.1-6 alkyl group or they form together with the adjacent nitrogen atom a heterocyclic ring containing 4 to 7 carbon atoms and optionally a further hetero atom, i.e. an oxygen, sulfur or nitrogen atom, and said ring may be optionally substituted by a C.sub.1-3 alkyl, phenyl or benzyl group,R.sup.2 and R.sup.3 each denote a hydrogen atom or together form a valency bond,R.sup.4 denotes a C.sub.1-10 alkyl or C.sub.2-10 alkenyl group, andn denotes an integer from 3 to 7.The compounds of the general formula /I/ are prepared according to the invention by reacting a cycloalkane derivative of the general formula /II/ ##STR2## wherein R.sup.2, R.sup.3, R.sup.4 and n have the same meaning as above, whereasY denotes an oxygen or sulphur atom or a .dbd.
    Type: Grant
    Filed: June 24, 1980
    Date of Patent: July 26, 1983
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Zoltan Budai, Aranka Lay nee Konya, Tibor Mezei, Lujza Petocz, Katalin Grasser, Ibolya Kosoczky, Eniko Szirt nee Kiszelly, Peter Gorog
  • Patent number: 4373100
    Abstract: The invention relates to fodder additives, fodder concentrates and fodders with weight gain increasing and fodder utilization improving effects, which contain as active agent a new compound of the general formula (I), ##STR1## The invention also relates to a process for the preparation of compounds having the general formula (I) by reacting a compound of the general formula (II), ##STR2## wherein Z is oxygen atom or represents two lower alkoxy groups and R.sup.1 is as defined above, with a compound of the general formula (III), ##STR3## wherein Q, A, B and n are as defined above, and, if desired, converting the resulting compound of the general formula (I) into another compound of the general formula (I) by well-known reactions.The compounds of the general formula (I) are new.
    Type: Grant
    Filed: June 2, 1981
    Date of Patent: February 8, 1983
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Pal Benko, Daniel Bozsing, Janos Gundel, Karoly Magyar
  • Patent number: 4373101
    Abstract: The invention relates to novel quinoxaline-2-yl ethenyl ketones, their preparation and compositions containing them.The novel quinoxaline-2-yl ethenyl ketones of the general formula I ##STR1## wherein R.sub.1 represents an aryl group or a heterocyclic group comprising one or more nitrogen and/or oxygen and/or sulfur atoms wherein both the aryl and heterocyclic groups are optionally substituted by one or more identical or different substituents,R.sub.2 stands for a hydrogen atom or a C.sub.1-4 alkyl group, are prepared by reacting an acetylquinoxaline derivative of the general formula II ##STR2## wherein R.sub.2 is as stated above, with an aldehyde of the general formula IIIR.sub.1 --CHO (III)wherein R.sub.1 is as stated above.The novel compounds of the general formula I possess valuable antibacterial effect and promote the growth of animals. Thus, the novel compounds can be incorporated in animal feeds.
    Type: Grant
    Filed: June 2, 1981
    Date of Patent: February 8, 1983
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Pal Benko, Daniel Bozsing, Janos Gundel, Karoly Magyar
  • Patent number: 4369325
    Abstract: A compound of the general formula (I), ##STR1## is described wherein R.sup.1 and R.sup.5 each represent a phenyl group optionally substituted with 1 to 3 lower alkoxy, halo, lower alkyl, monohalo-(lower)-alkyl, dihalo-(lower)-alkyl and/or trihalo-(lower)-alkyl groups, R.sup.2 stands for hydrogen or a lower alkyl group optionally substituted with a hydroxy group or 1 to 3 halogen atoms, R.sup.3 and R.sup.4 each represent a hydrogen atom or a lower alkyl group, and R.sup.6 stands for a carbamoyl, thiocarbamoyl or amidino group having optionally one or two lower alkyl and/or lower alkoxycarbonyl substitutes, or a group of the general formula R.sup.7 -CO-wherein R.sup.7 stands for a lower analkoxy group, an aryloxy group, or an aralkoxy group, and n is equal to 0, provided that when R.sup.1 and R.sup.5 each represent a phenyl group, R.sup.2 and R.sup.3 may not stand for hydrogen or a pharmaceutically acceptable acid addition salt, a pure isomer or an isomeric mixture thereof.
    Type: Grant
    Filed: August 11, 1981
    Date of Patent: January 18, 1983
    Assignee: EGYT Gyogyszervegyeszeti Gyar
    Inventors: Lajos Toldy, Zoltan Zubovics, Mariann Kurti, Inge Schafer
  • Patent number: 4364931
    Abstract: The invention relates to a composite insect attractant for male white-line dart moths [Scotia segetum] containing 7[Z]-dodecen-l-ol acetate of the formula [I] ##STR1## and 9[Z]-tetradecen-l-ol acetate of the formula [II] ##STR2## as active agents in a weight ratio of I to II of [50-99]:[50-1], optionally along with a liquid or solid adjuvant.Another object of the invention is an insect trap containing said composition and a process for attracting and trapping male white-line dart moths as well as a process for disrupting their mating by air permeation technique. The invention relates further to a novel process for the preparation of the active ingredients of the composition.
    Type: Grant
    Filed: December 24, 1980
    Date of Patent: December 21, 1982
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Csaba Szantay, Lajos Novak, Miklos Toth, Jozsef Jakab, Attila Kis-Tamas, Istvan Ujvari
  • Patent number: 4344959
    Abstract: The invention relates to new compounds of the general formula (I), ##STR1## wherein R.sup.1 is hydrogen or a lower alkoxy group andZ.sup.1 is hydrogen, orR.sup.1 and Z.sup.1 form together a double bond,Z.sup.2 is hydrogen andB is hydroxy, orZ.sup.2 and B form together a double bond,Z.sup.3 and Z.sup.4 each stand for hydrogen or they form together an ethylene group, orZ.sup.4 and D form together a double bond,C is oxygen atom or a lower alkoxy group,D is a valence bond if C stands for oxygen, or otherwise D forms a double bond together with Z.sup.4 or Z.sup.5,Z.sup.5 forms a double bond together with D or represents hydrogen, andR.sup.2 is a group of the general formula --COOR.sup.3, wherein R.sup.3 is lower alkyl, orZ.sup.5 and R.sup.2 form together a 1-oxo-2-oxa-tetramethylene group, with the proviso that if Z.sup.3 and Z.sup.4 form together an ethylene group, R.sup.2 may stand only for a --COOR.sup.3 group,insecticidal compositions containing them, as well as to a process for their preparation.
    Type: Grant
    Filed: April 6, 1981
    Date of Patent: August 17, 1982
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Lajos Novak, Csaba Szantay, Janos Rohaly, Attila Kis-Tamas, Laszlo Varjas, Janos Csutak
  • Patent number: 4342762
    Abstract: The invention relates to novel basic ethers of the general formula /I/ and pharmaceutically acceptable acid addition salts and quaternary salts thereof, ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different and represent a C.sub.1-5 alkyl group or a C.sub.3-6 cycloalkyl group or they form, together with the adjacent nitrogen atom, a heterocyclic ring containing 4-7 carbon atoms and optionally a further hetero atom, e.g. an oxygen, sulfur or nitrogen atom, and this latter may be optionally substituted by a C.sub.1-3 alkyl, benzyl or phenyl group,R represents a phenyl, phenyl-/C.sub.1-3 alkyl/ or thienyl group optionally substituted by one or more halogen or C.sub.1-3 alkoxy substituent/s/,A represents a C.sub.2-5 straight or branched alkylene chain, and represents a valence bond of .alpha. or .beta. configuration.
    Type: Grant
    Filed: December 11, 1980
    Date of Patent: August 3, 1982
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Zoltan Budai, Laszlo Magdanyi, Aranka Lay nee Konya, Tibor Mezei, Katalin Grasser, Lujza Petocz, Ibolya Kosoczky
  • Patent number: 4342766
    Abstract: New compounds are disclosed of the formulae ##STR1## or pharmaceutically effective salts thereof, wherein R is hydrogen, C.sub.1-12 alkyl, or R is phenyl or phenyl-C.sub.1 to C.sub.4 alkyl wherein the phenyl can be substituted with 1 to 3 halogen, C.sub.1 to C.sub.4 alkyl, or C.sub.1 to C.sub.4 alkoxy substituents; andX.sub.1, X.sub.2 and X.sub.3 are hydrogen, C.sub.1 to C.sub.6 alkanoyl, or C.sub.1 to C.sub.6 haloalkanoyl; and where X.sub.1 is hydrogen, X.sub.2 and X.sub.3 are not simultaneously hydrogen. The compounds possess antiphlogistic, analgesic, anticonvulsive, or tranquilizing properties.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: August 3, 1982
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Edit Berenyi nee Poldermann, Peter Gorog, Katalin Grasser, Ibolya Kosoczky, Agnes Koracs nee Palotay, Lujza Petocz
  • Patent number: 4332725
    Abstract: The invention relates to a novel process for the preparation of 1-[3-mercapto-(2S)-methylpropionyl]-pyrrolidine-(2S)-carboxylic acid through the N-acylation of L-proline.According to the process of the invention L-proline is acylated with a 3-halogen-2-methylpropionyl chloride of the formula III ##STR1## wherein Hal is a halogen atom, preferably chlorine or bromine, the obtained 1-[3-halogen-(2S)-methylpropionyl]-pyrrolidine-(2S)-carboxylic acid, wherein Hal is as stated above, is reacted with an alkali thiosulfate or alkali trithiocarbonate and the reaction product is hydrolized with an acid.The process of the invention is very economical as compared with the known processes. The desired product is prepared from methacrylic acid in 4 reaction steps with a total yield of 25 percent and from L-proline in 2 reaction steps with a total yield of 30 percent.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: June 1, 1982
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Janos Fischer, Laszlo Rozsa, Pal Vago, Anna Bakonyi, Gabor Fazekas
  • Patent number: 4332818
    Abstract: The invention relates to new stereoisomeric 1,4;3,6-dianhydro-2,5-diazido-2,5-dideoxy-hexitols of the Formula I.These compounds can be prepared by(a) reacting a hexitol derivative of the general Formula II /wherein R is a mesyl or tosyl group/ in an aqueous or anhydrous organic solvent with an alkali metal azide or ammonium azide; or(b) mesylating or tosylating a compound of the Formula III and treating the mixed ester of the general Formula IV thus obtained /wherein R is as stated above/ with a base; or(c) subjecting a compound of the Formula III to debenzoylation and subsequently to partial esterification and treating the compound of the general Formula V thus obtained /wherein R is as stated above/ with a base.The new compounds of the Formula I possess valuable hypnotic properties and can be used in therapy.
    Type: Grant
    Filed: March 11, 1981
    Date of Patent: June 1, 1982
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Janos Kuszmann, Gabor Medgyes, Ferenc Andrasy, Pal Berzsenyi
  • Patent number: 4324786
    Abstract: New pyrido[2,3-e]-as-triazine derivatives of the general formula (I), ##STR1## wherein R.sup.1 and R.sup.2 each stand for a C.sub.1-20 alkylcarbonyl, halogenated (C.sub.1-4 alkyl)-carbonyl, C.sub.1-4 alkoxycarbonyl, benzoyl, phenyl-(C.sub.1-4 alkyl)-carbonyl or phenyl-(C.sub.2-4 alkenyl)-carbonyl group or a 5-10-membered mono- or bicyclic nitrogen-containing heterocyclic acid residue (preferably a pyridylcarbonyl group) containing optionally one or more additional nitrogen, oxygen and/or sulfur atoms in the heterocyclic ring, and optionally one or more identical or different substituents selected from the group consisting of halogen, C.sub.1-4 alkoxy, nitro and hydroxy are attached to the aromatic or heterocyclic rings, furthermore one of R.sup.1 and R.sup.2 may also stand for hydrogen atom, orR.sup.1 and R.sup.2 may form, together with the adjacent nitrogen atoms, a pyrazole-2,4 ring having optionally a C.sub.1-6 alkyl substituent in position 3, andR.sup.3 stands for hydrogen, halogen, C.sub.
    Type: Grant
    Filed: April 25, 1980
    Date of Patent: April 13, 1982
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Andras Messmer, Pal Benko, Gyorgy Hajos, Lujza Petocz, Ibolya Kosoczky, Peter Gorog
  • Patent number: 4324894
    Abstract: Novel aminoisoquinoline derivatives of the general formula (I) ##STR1## wherein R.sub.1 represents a hydrogen atom or a C.sub.1-4 alkyl group,R.sub.2 represents a hydrogen atom,R.sub.3 represents a hydrogen atom,R.sub.4 represents a morpholinyl group or a piperazinyl group substituted with a pyridyl group, andpharmaceutically acceptable acid addition salts and quaternary derivatives thereof have been prepared. The novel compounds exert narcosis potentiating effects.
    Type: Grant
    Filed: April 10, 1980
    Date of Patent: April 13, 1982
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Pal Benko, Andras Gelleri, Gyorgy Hajos, Andras Messmer, Laszlo Pallos, Lujza Petocz, Ibolya Kosoczky, Katalin Grasser, Peter Gorog, Eniko Szirt nee Kiszelly
  • Patent number: 4316022
    Abstract: The invention relates to new benzo-as-triazine derivatives of the formulae (I) and (Ia) and pharmaceutically acceptable acid addition salts thereof, ##STR1## wherein R.sub.1 and R.sub.2 each represent hydrogen, a C.sub.1-20 alkylcarbonyl group, a phenylcarbonyl or phenyl-(C.sub.1-4 alkyl)-carbonyl group having optionally one or more halogen, hydroxy or C.sub.1-3 alkoxy substituents which may be the same or different, furthermore a pyridylcarbonyl, a pyrazinylcarbonyl, a furylcarbonyl, a chloroacetyl or a C.sub.1-4 alkoxycarbonyl group, orR.sub.1 and R.sub.2 may form, together with the adjacent nitrogen atoms, a pyrazole ring having optionally a C.sub.1-6 alkyl substituent in position 4,with the proviso that one of R.sub.1 and R.sub.2 is always different from hydrogen,R.sub.3 stands for hydrogen, mercapto group, a C.sub.1-4 alkylmercapto group, amino group, a C.sub.1-4 alkylamino group, a piperazino group having optionally an N-alkyl or 2-pyridyl substituent, a morpholino group or a piperidino group, andR.sub.
    Type: Grant
    Filed: March 28, 1980
    Date of Patent: February 16, 1982
    Assignee: EGYT Gyogyszervegyeszeti Gyar
    Inventors: Gyorgy Hajos, Andras Messmer, Pal Benko, Lujza Petocz, Peter Gorog, Ibolya Kasoczky
  • Patent number: 4310348
    Abstract: Racemic or optionally active 2-(propargyloxyimino)-1,7,7-trimethyl-bicyclo[2,2,1]heptane of the formula (I) ##STR1## or a mixture of these isomers is prepared by reacting a racemic or optically active 1,7,7-trimethyl-bicyclo[2,2,1]heptane derivative of the general formula (II), ##STR2## wherein Y stands for oxygen atom, sulfur atom or oxime group, with a propyne derivative of the general formula (III),R--CH.sub.2 --C.tbd.CH (III)whereinR stands for halogen atom or aminooxy group, with the proviso that if Y represents oxime group, R may stand only for halogen, and if R represents aminooxy group, Y may stand only for oxygen or sulfur atom.The resulting product is new and possesses strong plant growth promoting and insecticidal effects.This is a division of application Ser. No. 065,156, filed Aug. 9, 1979, now U.S. Pat. No. 4,244,888, Jan. 13, 1981.
    Type: Grant
    Filed: July 9, 1980
    Date of Patent: January 12, 1982
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Zoltan Budai, Ferenc Jurak, Attila Kis-tamas, Aranka Lay nee Konya, Tibor Mezei, Zoltan Vig, Terez Zubovits nee Kristof
  • Patent number: 4303660
    Abstract: The invention relates to novel pyrazolo[1,5-c]quinazoline derivatives of the general formula I ##STR1## wherein R represents a hydrogen atom, a C.sub.1-4 alkyl group or an acyl group,R.sub.1 represents a hydrogen atom, a C.sub.1-12 alkyl group, a C.sub.3-8 cycloalkyl group, a C.sub.2-4 alkenyl group, an aralkyl group, wherein the alkyl group has 1 to 4 carbon atoms, a phenylalkenyl group, wherein the alkenyl group has 2 to 4 carbon atoms, furthermore a carboxy group or a phenyl group optionally substituted by one or more substituents selected from the group consisting of halogen, hydroxy, C.sub.1-4 alkoxy, nitro or di(C.sub.1-4 alkyl)amino groups, orR and R.sub.1 may form together a valence bond,R.sub.2 represents a hydrogen atom, a C.sub.1-4 alkyl or a phenyl group, orR.sub.1 and R.sub.2 may form together a C.sub.2-7 alkylene group,R.sub.
    Type: Grant
    Filed: May 16, 1980
    Date of Patent: December 1, 1981
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Edit Berenyi nee Poldermann, Eniko Szirt nee Kiszelly, Peter Gorog, Lujza Petocz, Ibolya Kosoczky, Agnes Kovacs nee Palotai, Gabriella rmos nee Lassu
  • Patent number: 4285942
    Abstract: The invention relates to novel cyclododecane derivatives of the general formula ##STR1## wherein R.sup.1 and R.sup.2 represent independently from each other a hydrogen atom, a C.sub.1-6 alkyl group or a C.sub.3-8 cycloalkyl group, or R.sup.1 and R.sup.2 form together with the nitrogen atom to which they are attached a heterocyclic ring containing 4 to 7 carbon atoms and optionally a further heteroatom selected from the group consisting of oxygen, sulphur and nitrogen, said ring may be optionally substituted by a C.sub.1-3 alkyl or benzyl group; and A represents a C.sub.2-6 straight or branched alkylene chain, and optically active isomers, acid addition salts and quaternary ammonium derivatives thereof. The invention relates further to an analogous process for the preparation of said compounds, to pharmaceutical compositions containing said compounds as the active ingredient and to a process for the preparation of said pharmaceutical compositions.
    Type: Grant
    Filed: December 3, 1979
    Date of Patent: August 25, 1981
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Zoltan Budai, Aranka Lay nee Konya, Tibor Mezei, Katalin Grasser, Lujza Petocz, Eniko Kiszelly, Ibolya Kosoczky
  • Patent number: 4284642
    Abstract: The invention relates to new compounds of the general formula (I), ##STR1## wherein R.sup.1 and R.sup.5 each represent a phenyl group, optionally substituted,R.sup.2 stands for hydrogen, formyl group, carboxy group, lower alkoxycarbonyl group, hydroxy-(lower)-alkoxycarbonyl group, or a lower alkyl group, optionally substituted,R.sup.3 and R.sup.4 each represent hydrogen atom or a lower alkyl group, with the proviso that when R.sup.1 and R.sup.5 each represent a phenyl group, R.sup.2 and R.sup.3 may not stand for hydrogen.These compounds possess valuable biological properties, and can be applied primarily as antiphlogistic or diuretic agents.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: August 18, 1981
    Assignee: Egyt Gyogyszervegyeszeti Gyar
    Inventors: Lajos Toldy, Zoltan Zubovics, Mariann Kurti, Inge Schafer