A compound selected from the group consisting of a compound in all possible racemic, enantiomeric and diastereomeric forms selected from the group consisting of a compound of the formula ##STR45## wherein R.sub.1 is selected from the group consisting of hydroxyl, formyl, dioxol, aryl, aryl carbonyl, arylthio, alkoxy and alkyl carbonyl with alkyl of 1 to 6 carbon atoms, the aryl and alkyl unsubstituted or substituted with at least one member selected from the group consisting of --OH, carboxy, carboxy esterified with an alkanol of 1 to 6 carbon atoms, --CONH.sub.2, carboxy salified with a base, --CN, --NO.sub.2, --NH.sub.2, mono and di-alkylamino of 1 to 6 alkyl carbon atoms, cycloalkyl of 3 to 7 carbon atoms, alkyl and alkoxy of 1 to 6 carbon atoms, alkenyl of 2 to 6 carbon atoms, haloalkyl, alkoxythio, haloalkylthio and haloalkoxy of 1 to 6 carbon atoms, phenoxy, phenyl alkoxy of 1 to 6 alkyl carbon atoms, carbamoyl, acyl and acyloxy of an organic carboxylic acid of 1 to 6 carbon atoms, tetrazolyl, tetrazolyl salified with a base and phenyl unsubstituted or substituted with at least one member of the group consisting of halogen, --OH, alkyl and alkoxy of 1 to 4 carbon atoms, --CF.sub.3, --CN, carboxy, carboxy esterified with alkanol of 1 to 6 carbon atoms, carboxy salified with a base and tetrazolyl, R.sub.2 and R.sub.3 are individually selected from the group consisting of a) halogen, --SH, acyl of an organic carboxylic acid of 1 to 6 carbon atoms, carboxy, --CONH.sub.2, carboxy salified with a base, carboxy esterified with an alkanol of 1 to 6 carbon atoms, --NO.sub.2, --CN and --P(O) (OR).sub.2 and R is selected from the group consisting of hydrogen, alkyl of 1 to 4 carbon atoms and phenyl, b) R.sub.4 and --OR.sub.4 wherein R.sub.4 is --(CH.sub.2).sub.m1 --S(O).sub.m2 --X--R.sub.10 wherein m1 is an integer from 0 to 4, m2 is an integer from 0 to 2 and --XR.sub.10 is amino or X is selected from the group consisting of a single bond, --NR.sub.11 --, --NR.sub.11 --CO--, --NR.sub.11 COO--, --NR.sub.11 --CON.sub.R12 -- and --N.dbd.CR.sub.11 --NR.sub.12, R.sub.10 is selected from the group consisting of alkyl and alkenyl of up to 6 carbon atoms and aryl, all unsubstituted or substituted with at least one member of the group consisting of a') --OH, halogen, cycloalkyl of 3 to 7 carbon atoms, b') alkyl, alkoxy, haloalkyl, alkylthio, haloalkylthio and haloalkoxy of 1 to 6 carbon atoms, c') phenoxy, phenylalkoxy of 1 to 6 alkyl carbon atoms, carbamoyl, acyl and acyloxy of an organic carboxylic acid of 1 to 6 carbon atoms, carboxy, carboxy salified with a base, carboxy esterified with an alkanol of 1 to 6 carbon atoms, tetrazolyl, --CN, --NO.sub.2, --NH.sub.2, mono and dialkylamino of 1 to 6 alkyl carbon atoms and aryl substituted with at least one member of the group consisting of halogen, --OH, alkyl and alkoxy of 1 to 4 carbon atoms, --CF.sub.3, tetrazolyl, carboxy, carboxy salified with a base and carboxy esterified with an alkanol of 1 to 6 carbon atoms and R.sub.11 and R.sub.12 are individually hydrogen or a value of R.sub.10 or R.sub.4 is selected from the group consisting of a) hydrogen, b) alkyl, alkenyl, alkynyl and acyl of an organic carboxylic acid, all up to 6 carbon atoms and uninterrupted or interrupted by at least of one heteroatom selected from the group consisting of oxygen, sulfur and nitrogen, c) amino and carbamoyl unsubstituted or substituted with 1 to 2 alkyl and alkynyl of up to 6 carbon atoms, d) --(CH.sub.2).sub.m1 --S(O).sub.m2 --XR.sub.10 as defined above and e) cycloalkyl of 3 to 6 carbon atoms and aryl with the alkyl, alkenyl and aryl of R.sub.4 being unsubstituted or substituted by at least one member of the group consisting of a) halogen, --OH, --SH, --CN, azido, --NO.sub.2, --SO.sub.3 H, carboxy, carboxy salified with a base, carboxyl esterified with an alkanol of 1 to 6 carbon atoms and amidified carboxy, b) alkyl, alkenyl, alkoxy, haloalkyl, alkylthio, alkenylthio, alkynylthio, haloalkylthio, haloalkoxy, and acyl, acylthio and acyloxy of an organic carboxylic acid, all of up to 6 carbon atoms, c) aryl, arylthio, aralkyl, aralkenyl, aryloxy and arylalkoxy wherein the aryl is unsubstituted or substituted by at least one member of the group consisting of halogen, --OH, alkyl and alkoxy of 1 to 6 carbon atoms, haloalkyl, alkylthio, haloalkylthio, haloalkoxy, carbamoyl, acyl and acyloxy of an organic carboxylic acid of 1 to 6 carbon atoms, carboxy, carboxy salified with a base, carboxy esterified with an alkanol of 1 to 6 carbon atoms, --CN, --NO.sub.2, --NH.sub.2, mono and dialkylamino of 1 to 6 alkyl carbon atoms, tetrazolyl and phenyl unsubstituted or substituted with at least one member of the group consisting of halogen, --OH, alkyl and alkoxy of 1 to 4 carbon atoms, --CF.sub.3, tetrazolyl, carboxy, carboxy salified with a base and carboxy esterified with an alkanol of 1 to 6 carbon atoms and
- f) ##STR46## wherein R.sub.6 and R.sub.7 and R.sub.8 and R.sub.9 are individually selected from the group consisting of a) hydrogen, amino acids, b) alkyl and alkenyl of up to 6 carbon atoms unsubstituted or substituted by at least one member of the group consisting of halogen, --OH and alkoxy of 1 to 6 carbon atoms, c) aryl, aralkyl and arylalkenyl of up to 6 alkyl carbon atoms, all unsubstituted or substituted by at least one member of the group consisting of halogen, --OH, --CN, --NO.sub.2, alkyl, alkenyl, haloalkyl, alkoxy and acyl of an organic carboxylic acid, all of up to 6 carbon atoms, --NH.sub.2, mono and dialkylamino of 1 to 6 carbon atoms, carboxy, salified carboxy and carboxy esterified with an alkanol of 1 to 6 carbon atoms and aryl and aralkyl optionally substituted with at least one member of the group consisting of halogen, --OH, --CF.sub.3, --NO.sub.2, --CN, tetrazolyl, carboxy, carboxy salified with a base and carboxy esterified with an alkanol of 1 to 6 carbon atoms and d) --(CH.sub.2).sub.m1 --S(O).sub.m2 --XR.sub.10 defined as above or R.sub.6 and R.sub.7 or R.sub.8 and R.sub.9 together with the nitrogen to which they are attached form a heterocycle selected from the group consisting of imidazolyl, pyrrolyl, pyrrolinyl, pyrrolidinyl, pyridyl, piperidinyl, pyrimidinyl, pyridazinyl, pyrazinyl, piperazinyl, phenylpiperazinyl, piperidyl, oxazolyl, morpholinyl and thiomorpholinyl, azepine, indolyl, unsubstituted or substituted by at least by one member of the group consisting of halogen, hydroxyl, nitro, cyano, acyl, trifluoromethyl, alkyl and alkoxy of 1 to 4 carbon atoms, free carboxy, salified carboxy, esterified carboxy, amidified carboxy, tetrazolyl, oxazolyl and phenyl, or R.sub.8 and R.sub.9 are individually acyl of an organic carboxylic acid of 1 to 6 carbon atoms or one of R.sub.8 and R.sub.9 is carbamoyl or alkoxy carbonyl or benzyloxycarboxyl and the other is R.sub.8 as defined above or R.sub.8 and R.sub.9 together with the nitrogen atom form phthalimido or succinimido, Y is --Y.sub.1 --B--Y.sub.2, Y.sub.1 is aryl unsubstituted or substituted with dioxol or one of R.sub.2 and R.sub.3, B is a single bond or a member of the group consisting of ##STR47## p is 1, 2 or 3, Y.sub.2 is Y.sub.1, whatever B is or when B is a single bond, Y.sub.2 is selected from the group consisting of hydrogen, alkoxy of 1 to 6 carbon atoms, halogen, --CN, tetrazolyl, carboxy, carboxy salified with a base, carboxy amidified, carboxy esterified with an alkanol or 1 to 6 carbon atoms and --(CH.sub.2).sub.m1 --S(O).sub.m2 --XR.sub.10 defined as above and their non-toxic, pharmaceutically acceptable acid addition salts.