| 摘要 |
6-[[[(2-Cyanomethyl)amino]-1,2-dioxoethyl]amino]acyl pencillins which have the formula <IMAGE> wherein R is hydrogen, lower alkyl, tri(lower alkyl)silyl, tri(lower alkyl)stannyl, trihaloethyl or a salt forming ion; R1 is hydrogen, lower alkyl, saturated or unsaturated cycloalkyl, phenyl, phenyl-lower alkyl, substituted phenyl or certain heterocyclic groups; R2 is hydrogen or methoxy; R3 is hydrogen, lower alkyl, phenyl-lower alkyl or cycloalkyl; and R4 and R5 each is hydrogen or lower alkyl, are useful as antibacterial agents.
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