A compound represented by the following formula: wherein each of R 1a, R 1b, R 1c, R 1d and R 1e independently represents a hydrogen atom or a monovalent substituent excluding OH, provided that at least one substituent represents a substituent having a Hammett's σp value of 0.3 or more and substituents may combine with each other to form a ring, and each of R 1g, R 1h, R 1i, R 1j, R 1k, R 1m, R 1n and R 1p independently represents a hydrogen atom or a monovalent substituent with R 1h and R 1n each being a hydrogen atom, provided that substituents may combine with each other to form a ring, wherein the substituent having a Hammett's σp value of 0.3 or more is selected from the group consisting of: COOR r, wherein R r represents a hydrogen atom or an alkyl group; CONR s 2, wherein R s represents a hydrogen atom or a monovalent substituent; a cyano group; CF 3; a nitro group; and SO 3 M, wherein M represents a hydrogen atom or an alkali metal, and wherein the monovalent substituent is a halogen atom, a substituted or unsubstituted alkyl group having a carbon number of 1 to 20, an aryl group having a carbon number of 6 to 20, a cyano group, a carboxyl group, a substituted or unsubstituted alkoxycarbonyl group, an aryloxycarbonyl group, a substituted or unsubstituted carbamoyl group, a substituted or unsubstituted alkylcarbonyl group, an arylcarbonyl group, a nitro group, a substituted or unsubstituted amino group, an acylamino group, a sulfonamido group, an imido group, an imino group, a hydroxy group, a substituted or unsubstituted alkoxy group having a carbon number of 1 to 20, a substituted or unsubstituted aryloxy group, an acyloxy group, an alkylsulfonyloxy group, an arylsulfonyloxy group, a sulfo group, a substituted or unsubstituted sulfamoyl group, an alkylthio group, an arylthio group, a thiocyanate group, a substituted or unsubstituted alkylsulfonyl group, an arylsulfonyl group, or a heterocyclic group having a carbon number of 6 to 20, and in the case of having a substituent, the substituent is selected from the monovalent substituent as listed above with the proviso that when a plurality of substituents is present, they may be the same or different and may combine with each other to form a ring. COOR r, wherein R r represents a hydrogen atom or an alkyl group; CONR s 2, wherein R s represents a hydrogen atom or a monovalent substituent; a cyano group; CF 3; a nitro group; and SO 3 M, wherein M represents a hydrogen atom or an alkali metal, and wherein the monovalent substituent is a halogen atom, a substituted or unsubstituted alkyl group having a carbon number of 1 to 20, an aryl group having a carbon number of 6 to 20, a cyano group, a carboxyl group, a substituted or unsubstituted alkoxycarbonyl group, an aryloxycarbonyl group, a substituted or unsubstituted carbamoyl group, a substituted or unsubstituted alkylcarbonyl group, an arylcarbonyl group, a nitro group, a substituted or unsubstituted amino group, an acylamino group, a sulfonamido group, an imido group, an imino group, a hydroxy group, a substituted or unsubstituted alkoxy group having a carbon number of 1 to 20, a substituted or unsubstituted aryloxy group, an acyloxy group, an alkylsulfonyloxy group, an arylsulfonyloxy group, a sulfo group, a substituted or unsubstituted sulfamoyl group, an alkylthio group, an arylthio group, a thiocyanate group, a substituted or unsubstituted alkylsulfonyl group, an arylsulfonyl group, or a heterocyclic group having a carbon number of 6 to 20, and in the case of having a substituent, the substituent is selected from the monovalent substituent as listed above with the proviso that when a plurality of substituents is present, they may be the same or different and may combine with each other to form a ring.