12315; C.I. Pigment Red 22; Pigment red 22; Pigment Red 22; C.I. Pigment Red 22 (12315); (4Z)-4-[2-(2-methyl-5-nitrophenyl)hydrazinylidene]-3-oxo-N-phenyl-3,4-dihydronaphthalene-2-carboxamide; 3-hydroxy-4-(2-methyl-5-nitro-phenyl)azo-N-phenyl-naphthalene-2-carboxamide