Patent ID: 8877748

Claim:
A heterocyclic fused anthraquinone derivative, which is represented by a formula (I): wherein R 1 is sulfoalkyl group, piperazino group, amino-cyclopentylamino group, amino-butylamino group, amino-ethylamino, amino-2-methylpropylamino group, oxide potassium or one substituent represented by a formula (II): wherein R 2 is, oxyl group or a thiol group, and the one or more hydrogens of the phenyl group represented by a formula (II) can be substituted by halogen, alkoxy group, nitro group, methylthio group or sulfhydryl, wherein when R 2 is oxyl group then n is 0, and when n is thiol group then n is 0-2, wherein when R 1 is sulfoalkyl group, wherein the alkyl group is selected from the group consisting of C 1-10 straight-chain alkyl group, C 3-10 branched alkyl group and C 3-10 cyclic alkyl group, wherein when the R 2 is sulfur group, R 1 is 2,5-dimethylphenylthio group, benzylthio group, 4-chlorophenylthio group, 2,4-dimethylphenylthio group, 4-isopropylphenylthio group, 4-fluorophenylthio group, phenylthioethyl group, 2,3-dichlorophenylthio group, 4-tert-butylphenylthio group, 2-chlorophenylthio group, 2-fluorophenylthio group, 2,5-dichlorophenylthio group, 2-thiolphenylthio, 3-chlorophenylthio, 3-fluorophenylthio group, 2,4-difluorophenylthio group, 3,4-dimethylphenylthio group, 4-methylthiophenylthio group, 4-nitrophenylthio group, 3-methoxyphenylthio group, meta-benzylthio group, ortho-benzylthio group, 3,5-dimethylphenylthio group, 3-ethoxyphenylthio group, 2-ethylphenylthio group, 2-isopropylphenylthio group, 2,6-diethylphenylthio group 4-chlorobenzylthio group or 4-tert-butyl benzylthio group.