abstract |
The present invention addresses the problem of providing a compound having superior absorbance. The present invention pertains to a compound represented by formula (A-1). [R 1a -R 8a are a hydrogen atom, an alkyl group, an SO 3 n - group, or an SO 3 M group; R 9a and R 10a are a hydrogen atom, an alkyl group, an aromatic hydrocarbon group, or an aralkyl group; R 11a -R 20a are a hydrogen atom, an alkyl group, a halogen atom, an SO 3 n - group, or an SO 3 M group; R 45a and R 46a are a hydrogen atom, an alkyl group, or an aromatic hydrocarbon group; and R 55a is a hydrogen atom, an alkyl group, or an aromatic hydrocarbon group.] |