2,2-bis(ethylsulfanyl)acetic acid

4-(5-methylfuran-2-yl)-4-oxobut-2-enoic acid

4-甲基-5-羟基呋喃-2-酮

2-[(4-methylphenyl)sulfonylhydrazinylidene]acetic acid

2-hydroxy-2-(methylamino)acetic acid