Broad spectrum cephalosporin antibiotics represented by the formula ##STR1## are provided. In the formula, R represents a 2-aminooxazol-4-yl, 5-amino-1,2,4-oxadiazol-3-yl, or 5-aminoisoxazol-3-yl heterocyclic group; R' is hydrogen, C.sub.1 -C.sub.4 alkyl, a carboxy-substituted alkyl or cycloalkyl group or a C.sub.1 -C.sub.4 alkyl ester or carboxy-protecting ester derivative thereof; or an N-substituted carbamoyl group; and R.sub.1 and R.sub.2 are independently hydrogen or a substituent group, eg. halo, hydroxy, amino, carbamoyl, alkyl, or trifluoromethyl. The antibiotics are useful in a method for treating bacterial infections and can be formulated into pharmaceutical formulations for such use.
提供了以##
STR1##表示的广谱
头孢菌素抗生素。在公式中,R代表2-
氨基
噁唑-4-基,5-
氨基-1,
2,4-噁二唑-3-基,或5-
氨基
异噁唑-3-基杂环基团;R'是
氢,C.sub.1 -C.sub.4烷基,羧基取代的烷基或
环烷基团,或C.sub.1 -C.sub.4烷基
酯或羧基保护
酯衍
生物;或N-取代的
氨基甲酰基团;而R.sub.1和R.sub.2独立地是
氢或取代基团,例如,卤素,羟基,
氨基,
氨基甲酰基,烷基,或三
氟甲基。这些
抗生素可用于治疗细菌感染的方法,并可制成用于此类用途的药物制剂。