2-(2-VINYLPYRROLIDINYLTHIO)CARBAPENEM DERIVATIVES

摘要

A compound of the formula: (I) wherein R1 is a hydrogen atom or a methyl group, R2 is a hydrogen atom or a lower alkyl group, each of R3, R4 and R5 is a hydrogen atom or a lower alkyl group, or R3 and R4 together form a methylene group, an ethylene group or a propylene group, or R4 and R5 form together with the adjacent nitrogen atom an aziridinyl group, an azetidinyl group, a pyrrolidinyl group, a piperidino group, a piperazinyl group or a morpholino group; or a pharmaceutically acceptable salt or ester thereof.