| http://www.w3.org/ns/prov#value | - one azo compound represented by general formula (II): ##STR18## wherein X is selected from the group consisting of a hydrogen atom, a halogen atom and a cyano group, and n is an integer of 0 to 4; ##STR19## wherein R is selected from the group consisting of a hydrogen atom, a halogen atom and a substituted or unsubstituted alkyl group and alkoxy group, Z1 is selected from the group consisting of a
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