1-METHYL-CARBA-PENEM DERIVATIVES AND METHOD FOR PRODUCING THEM
摘要
<p>1-Methylcarbapenem derivatives of the formula: <CHEM> wherein R<1> is hydrogen atom or a hydroxy-protecting group, R<2> is hydrogen atom or an ester residue, R<3> is hydrogen atom or a lower alkyl group, or salts thereof, which have excellent antimicrobial activities and are useful as an antimicrobial drug.</p>
