This invention relates to novel cephem compounds, of antimicrobial activity, of the formula: ##STR1## wherein R.sup.1 is carboxy (C.sub.1 -C.sub.6) alkyl or esterified carboxy (C.sub.1 -C.sub.6) alkyl, R.sup.2 is carboxy or an esterified carboxy group, and R.sup.3 is (C.sub.1 -C.sub.6) alkanoylamino, (C.sub.1 -C.sub.6) alkanesulfonyl, triazolylthio, tetrazolylthio having (C.sub.1 -C.sub.6) alkyl, pyridazinylthio having (C.sub.1 -C.sub.6) alkyl, thiadiazolylthio having (C.sub.1 -C.sub.6) alkyl, triazolopyridazinylthio or tetrazolopyridazinylthio, and pharmaceutically acceptable salts thereof.
本发明涉及一种新型
头孢菌素化合物,具有抗微
生物活性,其
化学式为:##STR1##其中R.sup.1是羧基(C.sub.1-C.sub.6)烷基或酯化羧基(C.sub.1-C.sub.6)烷基,R.sup.2是羧基或酯化羧基,R.sup.3是(C.sub.1-C.sub.6)脂肪酰
氨基,(C.sub.1-C.sub.6)烷基磺酰基,三唑基
硫基,
四唑基
硫基,具有(C.sub.1-C.sub.6)烷基的
吡啶嗪基
硫基,具有(C.sub.1-C.sub.6)烷基的
噻二唑基
硫基,三唑并
吡啶基
硫基或
四唑并
吡啶基
硫基,以及其药学上可接受的盐。