A polycyclic carbapenem compound of the formula (Ia'), (Ib') or (Ic') ##STR1## [wherein COOR.sup.2 is a carboxy group which may be esterified; R.sup.a' is --(CH.sub.2).sub.m --K.sup.a --(CH.sub.2).sub.n --U.sup.a' ; J is O or S; R.sup.b' is --(CH.sub.2).sub.m --K.sup.b --(CH.sub.2).sub.n U.sup.b' ; J' is O, S or CH.sub.2 ; R.sup.c' is --(CH.sub.2).sub.m --K.sup.c --(CH.sub.2).sub.n --U.sup.c', --(CH.sub.2).sub.m --K.sup.d --(CH.sub.2).sub.n --U.sup.d or a pair of groups, one of which is a hydroxy group, with the other being a hydroxzy group or an alkylsulfonylamino group, which may be substituted, in the position ortho to the first-mentioned hydroxy group] or a salt thereof are useful as an antibacterial agent.
一个多环
碳青霉
烯化合物,其公式为(Ia'),(Ib')或(Ic')
STR1 [其中,COOR.sup.2是一个可能被
酯化的羧基;R.sup.a'是--(CH.sub.2).sub.m --K.sup.a --(CH.sub.2).sub.n --U.sup.a';J是O或S;R.sup.b'是--(CH.sub.2).sub.m --K.sup.b --(CH.sub.2).sub.n U.sup.b';J'是O、S或CH.sub.2;R.sup.c'是--(CH.sub.2).sub.m --K.sup.c --(CH.sub.2).sub.n --U.sup.c',--(CH.sub.2).sub.m --K.sup.d --(CH.sub.2).sub.n --U.sup.d或一对基团,其中一个为羟基,另一个为与第一个提到的羟基位置相邻的羟基或可能被取代的烷基亚磺酰
氨基团]或其盐,作为抗菌剂是有用的。