旧合成方法:(CH3)2C=O+HCN (CH3)2C(OH)CN
(CH3)2C(OH)CN+CH3OH+H2SO4 CH2=C(CH3)COOCH3+NH4HSO4
新合成方法:CH3C CH+CO+CH3OH CH2=C(CH3)COOCH3
下列叙述中,正确的是( )
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