| 摘要 |
A methine compound having a benzoxazole nucleus substituted by a meta-substituted aryl group and the methine compound represented by the following formula <IMAGE> (I) wherein R1 and R2 are the same or different and each represents a substituted or unsubstituted alkyl group; Z1 represents an atomic group necessary for forming a five-membered or six-membered nitrogen-containing heterocyclic ring; R3 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, a halogen atom, a substituted or unsubstituted alkylthio group, or a substituted or unsubstituted heterocyclic group; L1, L2 and L3 are the same or different and each represents a substituted or unsubstituted methine group; n represents 0, 1, 2 or 3; M1 represents an ion for neutralizing charge; and m1 represents a number of 0 or more necessary for neutralizing the molecular charge.
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