1,4-dimethyl-2-phenyl-1,4,2-diazaphospholidin-3,5-dione

2,3-二甲基-1,3-丁二烯

异氰脲酸三甲酯

2-n-butyl-1,4-dimethyl-1,4,2-diazaphospholidin-3,5-dione

diethyl 2-(methylcarbamoylamino)propanedioate