| 摘要 |
A novel pyrazolonoxonol compound represented by formula (A) and a silver halide photographic material comprising such a pyrazolonoxonol compound: <IMAGE> (A) wherein R1 and R2 each represents a hydrogen atom, an alkyl group or an aryl group, and the alkyl groups represented by R1 and R2 may bond each other to form a saturated 5- or 6-membered ring; R3 represents a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, a hydroxyl group, an alkoxy group, a carboxyl group, an ester group, a carbamoyl group, an amino group, an acylamino group, an ureide group, an urethane group or a cyano group; L1, L2, L3, L4 and L5 each represents a methine group, and the methine groups which are not adjacent to each other may bond each other to form a 5- or 6-membered ring; M represents a hydrogen atom or a monovalent cation; and m and n each represent an integer 0 or 1.
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