Abstract: The invention relates to compounds of the general formula: ##STR1## in which one double bond is present between the carbon atom of the quanidine moiety and one of the adjacent nitrogen atoms andR.sub.0 stands for hydrogen, halogen, hydroxy, alkoxy or alkyl (1 to 6 C),R.sub.1, r.sub.2 for halogen, hydroxy, alkyl (1 to 4 C) or alkoxy (1 to 4 C),R.sub.3, r.sub.3 ', r.sub.3 " for hydrogen or alkyl (1 to 4 C), on the understanding that one of the substituents R.sub.3, R.sub.3 ' or R.sub.3 " is absent because of the presence of the double bond,R.sub.4 for hydrogen, alkyl (1-4 C), hydroxy, alkoxy (1-4 C) or amino optionally substituted with one or two alkyl (1 to 4 C) groups,R.sub.5, r.sub.6 for hydrogen, alkyl (1-6 C), acyl or R.sub.5 + R.sub.6 together represent an alkylidene, cyclic alkylidene or aralkylidene group, as well as the acid addition salts thereof,Provided that, if R.sub.4 stands for methyl and R.sub.0, R.sub.3, R.sub.3 ", R.sub.5 and R.sub.6 for hydrogen, R.sub.1 and R.sub.

Abstract: The invention relates to novel amidino-hydrazone derivatives of the general formula: ##STR1## in which the dotted lines mean one extra bond starting from the (guanidine-) carbon atom to one of the adjacent nitrogen atoms, andA stands for methylene, ethylene, propylene or butylene, which groups may optionally be substituted with alkyl (1-4 C),R stands for hydroxy, alkyl (1-4 C), alkylthio or alkoxy (1-4 C), halogen, trifluoromethyl, nitro, amino, hydroxymethyl, acyloxy or an alkylenedioxy group,N is the number 0, 1, 2, 3 or 4,R.sub.1, r.sub.4 and R.sub.5 represent hydrogen or alkyl (1-4 C), with the proviso that one of them is absent in view of the presence of the double bond,R.sub.2 and R.sub.3 stand for hydrogen, alkyl (1-4 C), aralkyl, aryl, hydroxy or amino, with the proviso thatR.sub.2 + r.sub.3 together may also represent a saturated or unsaturated alkylene group with 2 or 3 carbon atoms, orR.sub.3 + r.sub.

Abstract: The invention relates to novel amidino-hydrazone derivatives of the general formula: ##STR1## in which the dotted lines mean one extra bond starting from the (guanidine-)carbon atom to one of the adjacent nitrogen atoms, andA stands for methylene, ethylene, propylene or butylene, which groups may optionally be substituted with alkyl (1-4 C),R stands for hydroxy, alkyl (1-4 C), alkylthio or alkoxy (1-4 C), halogen, trifluoromethyl, nitro, amino, hydroxymethyl, acyloxy or an alkylenedioxy group,n is the number 0, 1, 2, 3 or 4,R.sub.1, r.sub.4 and R.sub.5 represent hydrogen or alkyl (1-4 C), with the proviso that one of them is absent in view of the presence of the double bond,R.sub.2 and R.sub.3 stand for hydrogen, alkyl (1-4 C), aralkyl, aryl, hydroxy or amino, with the proviso thatR.sub.2 + r.sub.3 together may also represent a saturated or unsaturated alkylene group with 2 or 3 carbon atoms, orR.sub.3 + r.sub.

Abstract: The invention relates to novel biologically active compounds of the formula I: ##STR1## in which B is a N-hydroxy-amidino group of the general formula: ##STR2## A represents a methylene-, ethylene- or propylene group, optionally substituted with lower alkyl groupsr stands for the number: 0, 1, 2, 3 or 4R.sub.1 is hydroxy, alkyl, alkylthio or alkoxy, halogen (F, Cl, Br or I), trifluoromethyl, nitro, amino or alkylenedioxy (1-4 C),C.sub.n H.sub.2n is an alkylene group with 0-4 carbon atomsR.sub.2 stands for hydrogen, alkyl, aryl or aralkyl,R.sub.3, r.sub.4, r.sub.5 represent hydrogen, alkyl, aralkyl or acyl, andR.sub.6 stands for hydrogen, alkyl, or phenyl or benzyl optionally substituted with methyl groupsAnd pharmaceutically acceptable acid addition salts thereof. The compounds possess anti-hypertensive and vasodilatory activities.

Abstract: The invention relates to novel biologically active compounds of the formula I: ##SPC1##in which B is a N-hydroxy-amidino group of the general formula: ##EQU1## or ##EQU2## A represents a methylene-, ethylene- or propylene group, optionally substituted with lower alkyl groupsR stands for the number: 0, 1, 2, 3 or 4R.sub.1 is hydroxy, alkyl, alkylthio or alkoxy, halogen (F, Cl, Br or I), trifluoromethyl, nitro, amino or alkylenedioxy (1-4 C),C.sub.n H.sub.2n is an alkylene group with 0-4 carbon atomsR.sub.2 stands for hydrogen, alkyl, aryl or aralkyl,R.sub.3, r.sub.4, r.sub.5 represent hydrogen, alkyl, aralkyl or acyl, andR.sub.6 stands for hydrogen, alkyl, or phenyl or benzyl optionally substituted with methyl groupsAnd pharmaceutically acceptable acid addition salts thereof.

Abstract: The invention relates to compounds of the general formula: ##EQU1## in which one double bond is present between the carbon atom of the guanidine moiety and one of the adjacent nitrogen atoms andR.sub.0 stands for hydrogen, halogen, hydroxy, alkoxy or alkyl (1 to 6 C),R.sub.1, r.sub.2 for halogen, hydroxy, alkyl (1 to 4 C) or alkoxy (1 to 4 C),R.sub.3, r.sub.3 ', r.sub.3 " for hydrogen or alkyl (1 to 4 C) on the understanding that one of the substituents R.sub.3, R.sub.3 ' or R.sub.3 " is absent because of the presence of the double bond,R.sub.4 for hydrogen, alkyl (1-4 C), hydroxy, alkoxy (1-4 C) or amino optionally substituted with one or two alkyl (1 to 4 C) groups,R.sub.5, r.sub.6 for hydrogen, alkyl (1-6 C), acyl or R.sub.5 + R.sub.6 together represent an alkylidene, cyclic alklidene or aralkylidene group,As well as the acid addition salts thereof, provided that, if R.sub.4 stands for methyl and R.sub.0, R.sub.3, R.sub.3 ", R.sub.5 and R.sub.6 for hydrogen, R.sub.1 and R.sub.