Abstract: 2-Substituted-2-cyclopentenones represented by the formula (I): ##STR1## wherein A is a hydroxyl group or ##STR2## and B is a hydrogen atom or A and B are bonded together to form one bonding arm;R.sup.1 represents a substituted or unsubstituted hydrocarbon group having 1 to 10 carbon atoms;R.sup.2 represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 10 carbon atoms;R.sup.3 represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 10 carbon atoms; wherein,when R.sup.3 is a single bond bonded to the cyclopentene skeleton, X represents a hydrogen atom, a hydroxyl group or a protected hydroxyl group; andwhen R.sup.3 is a double bond bonded to the pentene skeleton, X represents a bonding arm constituting a part of said double bond; andm and n independently represent 0, 1 or 2.

Abstract: Novel 1,3-diaryl cyclopentanes of the following general formula were prepared. ##STR1## These compounds were found to have potent and specific PAF (Platelet Activating Factor) antagonistic activities and as such useful in the treatment or amelioration of various diseases or disorders mediate by the PAF, for example, hypotension, inflammation, nephritis, stroke and other cardiovascular disorders, asthma, allergic and skin diseases, peptic or stomach ulcer, shock, lung edema, psoriasis, adult respiratory distress syndrome, pain including dental pain, and aggregation of platelets.

Abstract: Prostaglandin derivatives having an oxo group at specified positions in the .alpha. side chain have a variety of physiological effects, notably a strong anti-ulcer activity accompanied by a limited ability to inhibit blood platelet aggregation.

Abstract: A composition and a method of using the same wherein said composition comprises a rodenticide and an additive selected from the group consisting of1. polyoxyalkylated alkyl phenols;2. sorbitan fatty acids and polyoxyalkylated derivatives thereof;3. polyoxyalkylated fatty amines;4. polyoxyalkylated branched or linear alcohols, diols or polyols;5. polyoxyalkylated branched or linear mercaptans;6. polyoxyalkylated esters; and7. polyoxyalkylated amines.The composition may optionally include an organic solvent and/or a dye. The rodenticide may be selected from a wide host of compounds, including brodifacoum, bromadiolone, diphacinone, chlorodiphacinone, monofluoroacetatic acid, bromethalin, calciferol, flocoumafen, and salts of such compounds.

Abstract: Compounds having the formula: ##STR1## are antagonists of leukotrienes of C.sub.4, D.sub.4, E.sub.4 and the slow reacting substance of anaphylaxis.As such, these compounds will be useful as anti-asthmatic, anti-allergic, anti-inflammatory and cytoprotective agents.

Abstract: The invention discloses certain diaryl substituted cyclopentane and cyclopentene derivatives useful as PAF inhibitors, pharmaceutical compositions containing said compounds as an active ingredient thereof and a method of using such compositions for inhibiting PAF-induced blood platelet aggregation, PAF-mediated broncho-constriction and extravasation, PAF-induced hypotension, PAF-induced ischemic bowel disease and PAF-mediated, endotoxin induced lug injury.

Abstract: Mono, di and tri-esters of 1,8-dihydroxy-10-phenyl-9-anthrone or -9-anthranol have the formula ##STR1## wherein p is 0 or 1,(a) when p=0, t=1 and R.sub.2 represents hydrogen or --COR.sub.3,(b) when p=1, t=0 and R.sub.1 and R.sub.2 each independently represent hydrogen or --COR.sub.3,R.sub.3 represents linear or branched alkyl having 1-17 carbon atoms, cycloalkyl, phenyl or phenyl substituted by lower alkyl, lower alkoxy, halogen, a nitro function, --CF.sub.3 or a hydroxyl function, and mixtures of said esters. These esters are prepared by reacting 1,8-dihydroxy-10-phenyl-9-anthrone with an activated form of an acid. The esters are useful in human or veterinary medicine and in cosmetic compositions.

Abstract: An improved method for the decarbalkoxylation of alkylated .beta.-keto esters to obtain high yields of ketones. In accordane with the method, decarbalkoxylation of alkylated .beta.-keto esters is accomplished by heating the esters in the presence of dilute aqueous alkali and an effective amount of a phase-transfer agent. The method produces commercially practical yields of ketone in a manner which is facile, economical and environmentally safe. Novel methylene-linked pyrethroid ketones produced from the improved method exhibit insecticidal activity against various agricultural pests.

Abstract: A compound of formula IIR.sub.A CH.sub.2 COCHDR.sub.bin which formula:R.sub.A represents a group ArCR.sub.1 R.sub.2 -- in which Ar represents a phenyl or naphthyl group optionally substituted by one or more halogen, alkoxy, haloalkoxy, methylenedioxy or C.sub.1 -C.sub.6 alkyl or haloalkyl groups;R.sub.1 and R.sub.2 together with the carbon to which they are attached jointly represent a C.sub.3 -C.sub.6 cycloalkyl group optionally substituted by one or more halogen atoms or C.sub.1 -C.sub.6 cycloalkyl groups andR.sub.B represents the residue of an alcohol R.sub.B CHDOH in which D is hydrogen or cyano and of which the [IR, cis]2,2-dimethyl-3-(2,2-dibromovinyl)cyclopropane carboxylic ester is signficantly insecticidal.

Abstract: A 4-hydroxy-2-cyclopentenone represented by the following formula (I) ##STR1## wherein X represents a hydrogen or halogen atom, A represents a hydrogen atom and B represents a hydroxyl group, or A and B are bonded to each other to represent a bond, R.sup.1 represents a substituted or unsubstituted alkyl, alkenyl or alkynyl group having 1 to 10 carbon atoms, R.sup.2 represents a substituted or unsubstituted alkyl, alkenyl or alkynyl group having 1 to 10 carbon atoms, and R.sup.3 represents a hydrogen atom or a protective group for a hydroxyl group, provided that R.sup.2 is not a 2-octenyl, 8-acetoxy-2-octenyl or 2,5-octadienyl group. The compounds of formula (I) in which A is hydrogen and B is hydroxyl group are prepared by subjecting a 5-unsubstituted cyclopentenone and an aldehyde to aldol condensation reaction. The compounds of formula (I) in which A and B form a bond is prepared by subjecting the compounds of the formula (I) in which A is hydrogen and B is hydroxyl group to dehydration.

Abstract: The invention relates to novel [(5,6-dichloro-3-oxo-9a-propyl-2,3,9,9a-tetrahydrofluoren-7-yl)oxy]ethanol , its derivatives, and their salts. The compounds are useful for the treatment and prevention of injury to the brain and of edema due to head trauma, stroke (particularly ischemic), arrested breathing, cardiac arrest, Reye's syndrome, cerebral thrombosis, cerebral embolism, cerebral hemorrhage, cerebral tumors, encephalomyelitis, spinal cord injury, hydrocephalus, post-operative brain injury trauma, edema due to cerebral infections including that due to AIDS virus, various brain concussions and elevated intracranial pressure.