| 摘要 |
<p>Penicillin derivs. of formula (I), their salts and their esters are prepared. In (I), R1 and R2 are each H, C1-6 alkyl, C1-6 hydroxyalkyl, C3-9 acyloxyalkyl, C8-13 benzyloxyalkyl, C2-7 alkoxyalkyl, C3-8 alkenyloxycarbonyl, C3-8 alkynyloxycarbonyl, phenyl, cyano, formyl, trifluoromethyl, C2-6 acyl, carbamoyl or C2-7 alkylcarbamoyl; R3 is H or carboxyl protecting gp. (I) are useful as beta-lactamase inhibitors.</p> |
