prop-1-en-2-yl 4-oxopentanoate

N,N-diethyl-4-hydroxypentanamide

3-乙酰基丙烯酸

(2,4-二甲基-1,3-噻唑-5-基)乙酸

3-(2-Methyl-1,3-thiazol-5-yl)propanoic acid