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侣里 H CH2CH3 CH2OH CH2OH OH CH3NO2+3 HCHO HOCH2 C-NO2 H2 ,HOCH2C-NH CH2OH CH2OH a一负C HO CH2NO2 HO CH2NH2 NaOC2H5 AcOH H2 CH3NO2 Ni 78≈84%78～84% CH3NO2 + HCHO OHHOCH2 C NO2 CH2OH CH2OH H2 HOCH2 C NH2 CH2OH CH2OH 3 O + CH3NO2 NaOC2 H5 AcOH HO CH2NO2 HO CH2NH2 H2 Ni －负C