Patent ID: 6294527
Filing Date: 2001-09-25
Classification: A61P,C07D

Abstract:
A cephem compound or pharmaceutically acceptable salt thereof having the formula (I): ##STR15##represents a benzene ring, pyridine ring, pyrazine ring, or a 5-membered aromatic heterocycle having one oxygen or sulfur atom as a ring-constituting atom;X and Y each independently represents hydrogen or CXY represents C.dbd.N--OR.sub.5, wherein R.sub.5 represents hydrogen, halo C.sub.1 -C.sub.6 alkyl or C.sub.3 -C.sub.7 cycloalkyl;R.sub.1 represents phenyl, furyl, thienyl, thiazolyl which is optionally substituted, tetrazolyl or thiadiazolyl; andR.sub.2, R.sub.3 and R.sub.4 each independently represents hydrogen, halogen, hydroxyl, nitro, C.sub.1 -C.sub.6 alkoxy, trifluoromethyl, amino C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, morpholino, piperidino or piperazinyl; with the proviso that when ##STR16##represents 5-membered aromatic heterocycle, no group R.sub.4 is present.