That it provides a [challenge] Nitorosurufido dye. Expression to be solved [means] disclosure of [1] (1) Yes Nitorosurufido dye at is expressed, their salts, isomers, a solvate, and other hydrate [In the above formula,2, R 3 R 1, R independently of one another, a hydrogen atom, carbon atom 1 of one or more alkoxy groups of 5, a halogen atom, -NH 2, mono - carbon atoms alkylamino of 1 to 5 di - carbon atoms 1 to be substituted alkylamino group 5, the hydroxy group or -NO 2, carbon atoms 1 to carbon atoms or C 1 20 alkyl to alkoxy groups of 20 to carbon atoms 3 a cycloalkyl group having 6 -C (O) H -C (O) - carbon atoms alkyl of 1 to 5 -C (O) OH -C the absence (O) O- carbon atoms of 1 to 5 alkyl group halogen atom NO 2 OH SH carbon atoms 1 or more alkyl of 1 to 5, carbon atoms alkoxy of 1 to 5, a halogen atom, -NH 2, mono - carbon atoms 1 no alkylamino group at the 5-di - carbon atoms 1 to be substituted alkylamino group 5, the hydroxy group or -NO 2, phenyl or formula (1a) -NR 4 R 5 (Wherein, independently of one another, a hydrogen atom and R 4 and R 5 the carbon atoms 1 or more alkyl of 1 to 5, carbon atoms alkoxy of 1 to 5, a hydroxy group or - (CO) - may be replaced by H, carbon atoms alkyl of 1 to 12-and (CO) - carbon atoms alkyl of 1 to 5 carbon atoms one of the one or more phenyl moiety alkyl group at the 5-carbon no atoms alkoxy of 1 to 5, a halogen atom, -NH 2, mono - carbon atoms alkylamino of 1 to 5, di - carbon atoms alkylamino of 1 to 5, -NO 2, carboxy or hydroxy group may be replaced by a group, phenyl group or phenyl - carbon atoms alkyl of 1 to 4 expression or embedded image I represents a group represented by the formula. Represents a group represented by) One of R 3 represents an NO 2 or the radicals R 1, R 2 at least Carbon atoms cycloalkylene of 5 to 10 carbon atoms 5 arylene 10 carbon atoms 1 alkylene 10 Y 1 is not carbon atoms 5 or arylene of 10 - (carbon atoms 1 it is not to represent an alkylene) group of 10 Z 1 is a direct bond [3] of Or repr
