Studies on .BETA.-lactam antibiotics. VIII. Structure-activity relationships of 7.BETA.-((Z)-2-carboxymethoxyimino-2-arylacetamido)-3-cephem-4-carboxylic acids.

Abstract
The synthesis, antimicrobial activity and oral absorptivity of 7.beta.-[(Z)-2-carboxymethoxy-imino-2-arylacetamido]-3-cephem-4-carboxylic acids are described. The [(Z)-2-(2-amino-4-thiazolyl)-2-carboxymethoxyimino]acetyl group was selected as the most suitable 7-substituent from seven 7-acyl groups for our further investigation of orally active cephalosporins.