(+/-) 3-(methoxycarbonyl)-4-oxopentanoic acid

乙酰丙酸

(4-chloro-2,6-dimethyl-pyrimidin-5-yl)-acetic acid methyl ester

4-羟基-2,6-二甲基-5-嘧啶乙酸

2-(3,5-dimethyl-7-oxofuro[3,2-g]chromen-6-yl)acetic acid