甲亚胺酸

1-picryl-3,4,5-trimethylpyrazole

α,α-diphenyl-β-picrylhydrazyl radical

N-(4-Methylphenyl)-4-methylbenzenesulfinamide

N-(4,4'-bis-dimethylamino-benzhydrylidene)-2,4,6-trinitro-aniline