| 摘要 |
A compound of one of formulae (I) and (II) (of formula sheet) wherein R1 represents a radical selected from the group consisting of hydrogen alkyl containing up to 6 carbon atoms and being unsubstituted or substituted by at least one of the groups alkoxy and phenylalkoxy containing up to 4 carbon atoms in the alkoxy moiety; aryl or aralkyl each containing from 1 to 4 carbon atoms in the alkyl moiety and being unsubstituted or substituted by at least one substituent selected from the group consisting of alkyl, alkoxy and haloalkyl containing up to 4 carbon atoms, halogen and nitro; a 5- or 6-membered heteroaromatic ring containing up to 2 hetero atoms chosen from O,N and S, at most one of which is different from nitrogen; an alkyl group containing from 1 to 4 carbon atoms substituted by such a heteroaromatic ring; R2 and R3, which are the same or different, each represents a hydrogen atom or, alkyl containing up to 4 carbon atoms and being unsubstituted or substituted by at least one substituent selected from the group consisting of alkyl, alkoxy and haloalkyl containing up to 4 carbon atoms, halogen and nitro; taken together R2 and R3 alternatively represent a -CH=CH-CH=CH- group which is unsubstituted or substituted by a substituent selected from the group consisting of alkyl, alkoxy and haloalkyl, each containing up to 4 carbon atoms, halogen and nitro; R4 is selected from the group consisting of hydrogen alkyl, aryl and aralkyl containing up to 4 carbon atoms in each alkyl moiety; and A represents a single bond or alkylene containing from 1 to 6 carbon atoms; with the proviso that R1 is other than a hydrogen atom or methyl group when A represents a single bond and R2 and R3 taken together represent an unsubstituted -CH=CH-CH=CH- group; physiologically acceptable salts thereof, a synthesis therefor and a pharmaceutical composition containing it. |
