| 摘要 |
A compound represented by the following formula (I) or a salt thereof: wherein R<1 >and R<2 >represent an alkyl group or an aryl group; R<3 >to R<6 >represent hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, a halogen atom, cyano group, carboxyl group or sulfo group; X<1 >and X<2 >represent an alkyl group having 1 to 15 carbon atoms or an aryl group, and the total number of carboxyl groups existing in X<1 >and X<2 >is 4 or less; m<1 >to m<3 >represents 0 or 1; L<1 >to L<7 >represent a methine group; M represents hydrogen atom, a metal or a quaternary ammonium salt; Y represents nonmetallic elements required to form a 5- to 10-membered heterocyclic ring; and n represents an integer of 1 to 7 required to neutralize charge, which is useful for manufacture of silver halide photographic light-sensitive materials.
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