Carbacephalosporin compounds of formula (I), ##STR1## salts thereof, processes for their synthesis and uses thereof, wherein: R.sup.1 is hydrogen, methoxy or formamido; R.sup.2 is an acyl group; CO.sub.2 R.sup.3 is a carboxy group or a carboxylate anion, or R.sup.3 is a carboxy protecting group or a pharmaceutically acceptable salt-forming group or in vivo hydrolysable ester group; R.sup.4, R.sup.5, R.sup.6 and R.sup.7 represent hydrogen or a substituent; R.sup.4 and R.sup.7 may be replaced by a chemical bond between the two carbon atoms shown; R.sup.5 and R.sup.6 may be linked together into a cyclic system. The compounds (I) have antibacterial properties.
化合物(I)的卡巴
头孢菌素化合物,其公式为:##STR1##其中:R1为氢、甲氧基或甲酰胺基;R2为酰基;CO2R3为羧基或
羧酸盐基,或者R3为羧保护基或药学上可接受的盐形成基或体内可
水解的酯基;R4、R5、R6和R7代表氢或取代基;R4和R7可以被所示的两个碳原子之间的
化学键所取代;R5和R6可以连接成环状系统。化合物(I)具有抗菌性能。