It's also got the carboxylic acid though, so let's go ahead and call it butenoic acid.
不过它也含有羧酸， 所以让我们继续称之为丁烯酸。
Butenoic acid
原声例句
Crash Course 综合篇
英语百科
Crotonic acid
![Ball-and-stick model of the crotonic acid molecule](/Images/godic/202501/02/Crotonic_acid_3D_ball1714.png")
Crotonic acid, or trans-2-butenoic acid, is a short-chain unsaturated carboxylic acid, described by the formula CH3CH=CHCO2H. Crotonic acid is so named because it was erroneously thought to be a saponification product of croton oil. It crystallizes as needles from hot water.
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