论文部分内容阅读
【正】 GCLE(7-phenylacetamide-3-chloromethyl-3-cepham-4-carboxylicacid p-methoxybenzyl ester)as an im-portant intermediate of cephalosporinantibiotics is not new in China.GCLE,7-ADCA(7-aminodeacetoxyl)and 7-ACA(7-aminocephalosporanic acid)are called three ma