| abstract |
Antimicrobial 2-oxo-1-azetidinesulphonic acids of the formula <IMAGE> in which H2N <IMAGE> represents an amino-substituted thiazolyl group, R1 is lower alkyl which is substituted by carbamoyl, lower alkylsuphonyl, azido, piperidine-carbonyl, (hexahydro-1H-azepin-1-yl)carbonyl or lower alkynyl, and R2 is hydrogen or a lower organic group, typically, carbamoyloxymethyl. |