Cephalosporins represented by the formula X-S-Y wherein X is a deacetoxycephalosporinyl group and Y is a 6-membered heterocyclic group containing 1-3 nitrogens at least one of which is substituted and at least one of which is adjacent to a carbonyl group, said heterocyclic group containing one or more ring substituents and being characterized by being non-aromatic and not enolizable to an aromatic form.
该文本的翻译如下:
头孢菌素的分子式为X-S-Y,其中X是去乙酰基
头孢菌素基团,Y是含有1-3个氮原子的6元杂环基团,其中至少一个被取代,至少一个与羰基相邻,该杂环基团含有一个或多个环取代基,并具有非芳香性和不能转变为芳香性形式的特征。