双乙烯酮

甲醇钠

2-benzoylamino-3-chloro-crotonic acid methyl ester

1-(5-methyl-2-phenyl-1,3-oxazol-4-yl)ethanone

1-(5-methyl-3-oxido-2-phenyl-1,3-oxazol-3-ium-4-yl)ethanone,hydrochloride