| abstract |
Novel α-amino acid compounds, methods for their preparation and pharmaceutical compositions containing themn n n If present, a compound of formula (I), a tautomer, as an additional salt thereof with the tautomer and a pharmaceutically acceptable acid, simultaneously Represents an unsubstituted 5-membered nitrogen-containing heterocycle, Ak represents a group-(CH 2 ) 3- , X represents a single bond, Y represents NH, and R 3 represents a nitro group compound:n n n n n n n n In the above formula Represents an optionally substituted 5-membered nitrogen-containing heterocycle;n n n Ak represents an alkylene group;n n n X represents a single bond or a phenylene group;n n n R 1 and R 2 are the same or different and each represents a hydrogen atom or an alkyl group;n n n R 3 represents an alkyl, nitro, or cyano group;n n n Y represents NR 4 or CHNO 2 , wherein R 4 represents a hydrogen atom or an alkyl group.n n n drugs. |