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(7)CH2=CHC2H5OHH+HBr2CH3CH2BrNaCNH3O¡÷+CH3CH2COOHBr2PCH3CH(Br)COOHH2OHClCH3CH(Br)COOC2H5Zn¸ÉÃÑCH3CH(ZnBr)COOC2H5CH3CH2CHO

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(2) C2H5ONa , CH3CH(Br)COOC2H5 , CH3COCH2CH(CH3)COOC2H5 (3) HOCH2CH2OH / ¸ÉHCl , CH3COCH2C(OH)(C6H5)2

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