| 英文同义词: | 1,2-dihydro-6-hydroxy-4-methyl-5-[(2-methyl-4-nitrophenyl)azo]-2-oxonicotinonitrile;3-Cyano-6-hydroxy-4-methyl-5-(2-methyl-4-nitrophenylazo)-2(1H)-pyridone;(5Z)-4-methyl-5-[(2-methyl-4-nitrophenyl)hydrazinylidene]-2,6-dioxopyridine-3-carbonitrile;3-Pyridinecarbonitrile, 1,2-dihydro-6-hydroxy-4-methyl-5-[2-(2-methyl-4-nitrophenyl)diazenyl]-2-oxo- |