| abstract |
Compounds of general formula <IMAGE> (I) wherein R1 represents a radical selected from the group consisting of (a) hydrogen, carboxyl; (b) alkyl, alkenyl each having up to 6 carbon atoms and their phenyl substituted derivatives; (c) at most binuclear unsubstituted aryl, at most binuclear aryl substituted by from 1 to 3 substituents selected from the group consisting of alkyl and alkoxy each having up to 6 carbon atoms, benzloxy, haloalkyl having up to 2 carbon atoms, halogen, cyano and nitro; amino, carboxyl and hydroxy; amino, carboxyl and hydroxy each being substituted by alkyl having at most 2 carbon atoms, methylenedioxy groups and O-<3-[4-(2-methoxyphenyl)-1-piperazinyl]-2-hydroxypropyl>-hydroximinom ethyl groups; (d) at most bicyclic unsubstituted heteroaromatic group having 1 to 4 heteroatoms selected from the group consisting of nitrogen, one sulphur and one oxygen in the ring system and such a heteroaromatic group being substituted by at most 3 substituents selected from the group consisting of alkyl, alkoxy each having up to 2 carbon atoms, phenylalkyl having up to 3 carbon atoms in the alkyl moiety, halogen, methylamino and dimethylamino; R2 represents a member selected from the group consisting of hydrogen, alkyl having up to 3 carbon atoms, cycloalkyl having up to 6 carbon atoms and phenyl; and R1 and R2, together with the carbon atom to which they are attached, form a radical selected from the group consisting of fluorene-9-ylidene and a cycloaliphatic group having up to 10 carbon atoms and such a cycloaliphatic group containing a hydrocarbon bridging group; R3 represents a member selected from the group consisting of hydrogen hydroxy and acyloxy; R4 represents a member selected from the group consisting of hydrogen alkyl having up to 3 carbon atoms and phenyl; R5 represents a member selected from the group consisting of halogen, alkoxy having up to 2 carbon atoms and hydroxy; and X represents a member selected from the group consisting of nitrogen and methine and physiologically acceptable acid addition salts thereof; a pharmaceutical composition containing said compounds. |