丁二酸二甲酯

1,3-二甲基脲

1,3,4,6-tetramethyl-3a,6a-diphenyl-5-thioxohexahydroimidazo[4,5-d]imidazol-2(1H)-one

1,3-dimethyl-4,5-diphenyl-5-imidazoline-2-thioneN,N-dimethyl-4-oxo-4H-chromene-2-carboxamide

dibutyltin