A coloring compound with a structure represented by the following formula (1): ##STR00001## wherein R.sup.1 to R.sup.3 independently denote a hydrogen atom, an unsubstituted amino group, or an amino group with a substituent, R.sup.4 to R.sup.6 independently denote a hydrogen atom, an alkyl group, an unsubstituted aryl group, or an aryl group with a substituent, A.sup.1 to A.sup.3 independently denote a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a carbamoyl group, an alkoxycarbonyl group, a carboxylic acid amide group, an alkoxysulfonyl group, a sulfonic acid amide group, a trifluoromethyl group, a cyano group, a hydroxy group, a nitro group, an amino group, or a halogen atom, and the aryl group, the carboxylic acid amide group, the sulfonic acid amide group, and the amino group in A.sup.1 to A.sup.3 may have a substituent, and n denotes an integer in the range of 1 to 5.

A coloring compound with a structure represented by the following formula (1): ##STR00001## wherein R.sup.1 to R.sup.3 independently denote a hydrogen atom, an unsubstituted amino group, or an amino group with a substituent, R.sup.4 to R.sup.6 independently denote a hydrogen atom, an alkyl group, an unsubstituted aryl group, or an aryl group with a substituent, A.sup.1 to A.sup.3 independently denote a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a carbamoyl group, an alkoxycarbonyl group, a carboxylic acid amide group, an alkoxysulfonyl group, a sulfonic acid amide group, a trifluoromethyl group, a cyano group, a hydroxy group, a nitro group, an amino group, or a halogen atom, and the aryl group, the carboxylic acid amide group, the sulfonic acid amide group, and the amino group in A.sup.1 to A.sup.3 may have a substituent, and n denotes an integer in the range of 1 to 5.

A coloring compound with a structure represented by the following formula (1):

##STR00001## wherein R.sup.1 to R.sup.3 independently denote a hydrogen atom, an unsubstituted amino group, or an amino group with a substituent, R.sup.4 to R.sup.6 independently denote a hydrogen atom, an alkyl group, an unsubstituted aryl group, or an aryl group with a substituent, A.sup.1 to A.sup.3 independently denote a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a carbamoyl group, an alkoxycarbonyl group, a carboxylic acid amide group, an alkoxysulfonyl group, a sulfonic acid amide group, a trifluoromethyl group, a cyano group, a hydroxy group, a nitro group, an amino group, or a halogen atom, and the aryl group, the carboxylic acid amide group, the sulfonic acid amide group, and the amino group in A.sup.1 to A.sup.3 may have a substituent, and n denotes an integer in the range of 1 to 5.

A coloring compound with a structure represented by the following formula (1):

##STR00001## wherein R.sup.1 to R.sup.3 independently denote a hydrogen atom, an unsubstituted amino group, or an amino group with a substituent, R.sup.4 to R.sup.6 independently denote a hydrogen atom, an alkyl group, an unsubstituted aryl group, or an aryl group with a substituent, A.sup.1 to A.sup.3 independently denote a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a carbamoyl group, an alkoxycarbonyl group, a carboxylic acid amide group, an alkoxysulfonyl group, a sulfonic acid amide group, a trifluoromethyl group, a cyano group, a hydroxy group, a nitro group, an amino group, or a halogen atom, and the aryl group, the carboxylic acid amide group, the sulfonic acid amide group, and the amino group in A.sup.1 to A.sup.3 may have a substituent, and n denotes an integer in the range of 1 to 5.