CEPHEM COMPOUND HAVING CATECHOL GROUP

摘要

A compound of the formula:
wherein
X is -N=, -CH=, or the like;
W is -CH 2 - or the like;
U is -S- or the like;
R 1 and R 2 are each independently hydrogen, halogen, optionally substituted lower alkyl, or the like;
R 3 is hydrogen or the like;
each R 4 is independently hydrogen, halogen, or the like;
m is an integer from 0 to 2;
Q is a single bond, or the like;
G is -C(=O)-, or the like;
D is a single bond, -NH-, or the like; and
E is a cyclic quaternary ammonium group,
or an ester, a protected compound at the amino on the ring in the 7-side chain, a pharmaceutically acceptable salt, or a solvate thereof.