摘要:(1)①③④ (2)碳碳双键 羧基 (3)HOOC-CH=CH-COOH CH2=C2 (4)HOOC-CH=CH-COOH+2CH3OHCH3OOCCH=CHCOOOCH3+2H2O (5)HOOCCH2CH(NH2)COOH

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