Patent ID: 7297196

Claim:
An anthrapyridone compound represented by the following formula (1): wherein R 1 represents a hydrogen atom, an alkyl group, a hydroxy lower alkyl group, a cyclohexyl group, mono- or dialkylaminoalkyl group or a cyano lower alkyl group; Y represents a chlorine atom, a hydroxyl group, an amino group, mono- or dialkylamino group optionally substituted with a substituent selected from the group consisting of a sulfonic acid group, a carboxyl group and a hydroxyl group on an alkyl group, or a morpholino group; X represents the following formula (2): wherein R 2 , R 3 , R 4 , R 5 and R 6 each independently represent a hydrogen atom, a C 1-8 alkyl group or a carboxyl group, provided that such a case is excluded that all of R 2 , R 3 , R 4 , R 5 and R 6 are hydrogen atoms or the salt thereof.