Patent ID: 8211606

Claim:
A coloring compound having a structure represented by the general formula (1): General Formula (1) wherein R 1 represents a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group, or an optionally substituted aralkyl group; R 2 represents a hydrogen atom, an optionally substituted alkyl group, an optionally substituted cycloalkyl group, or an optionally substituted aralkyl group; R 3 represents an optionally substituted alkyl group or an optionally substituted aryl group; the total number of carbon atoms of R 1 , R 2 and R 3 is 4 or more but 16 or less; R 4 , R 5 and R 7 each independently represent a hydrogen atom, a halogen atom or a nitro group; and R 6 represents a fluorine atom, a trifluoromethyl group, or a cyano group.