5,5-二甲氧基-1,4-二甲基-2-哌嗪酮

1,4-dimethyl-3,6-bis(sulfanyl)piperazine-2,5-dione

S-(5-acetylsulfanyl-1,4-dimethyl-3,6-dioxopiperazin-2-yl) ethanethioate

N,N′-二甲基草酰胺

草酸