| 摘要 |
Compounds of formula (I): <CHEM> wherein R<1> is optionally substituted phenyl and R is a cycloalkyl group having an alkyl substituent in the 1-position; or R<1> is phenyl substituted by at least one fluorine atom and/or at least one trifluoromethyl group and R is hydrogen or an organic radical, and their salts and esters, are useful in the treatment of bacterial infections in humans and animals. |
