2-(Diacetylmethylene)1-methylimidazolidine

4,4-bis(methylsulfanyl)but-3-en-2-one

N-甲基乙二胺

3-[双(甲基磺酰基)亚甲基]-2,4-戊二酮

1-methyl-2-methylsulfanyl-4,5-dihydroimidazole