| abstract |
The coloring matter compound is represented by the following general formula (1): n nwherein R 1 and R 2 each independently represent an alkyl group or an acyl group, or R 1 and R 2 may be bonded to each other so as to form a cyclic organic functional group containing, as a hetero atom, a nitrogen atom to which R 1 and R 2 are bonded; R 3 and R 4 each independently represent an alkyl group; R 5 and R 6 each independently represent an alkyl group or an alkoxy group; R 7 represents a hydrogen atom, an alkyl group or an alkoxy group; and R 8 represents an alkyl group. |