A cephalosporin compound of the formula: ##STR1## wherein R.sup.1 is hydrogen or lower alkyl; R.sup.2 is acetoxy or (1-methyl-1H-tetrazol-5-yl)thio, and R.sup.3 is carboxy; or R.sup.2 is a group of the formula: ##STR2## R.sup.3 is --COO.sup.- and Y is hydrogen, hydroxymethyl or carbamoyl; and n is an integer of 2 or 3, or a pharmaceutically acceptable salt thereof and processes for their preparation are disclosed. Said cephalosporin compound is useful as an antimicrobial agent.
一种
头孢菌素化合物的
化学式如下:##STR1##其中R.sup.1为氢或较低的烷基;R.sup.2为乙酰氧基或(1-甲基-1H-
噻唑-5-基)
硫基,R.sup.3为羧基;或者R.sup.2为下述
化学式的基团:##STR2##R.sup.3为--COO.sup.-,Y为氢、羟甲基或羰胺基;n为2或3的整数,或其药用盐,以及其制备方法。所述的
头孢菌素化合物可用作抗微
生物剂。