COD(+)甘油醛 CHOL-(-)-甘油醛 OH HO H CHOO R(+)-甘油醛 CH2OHS+(甘油醛 单糖的构型以甘油醛为标准,最后一个手性碳与D(+)-甘油醛相同就是D 型糖,反之就是L型糖 COOH H-OH H,0 H-OH H-OH H-Oh H-十OH H-oH CHO CH,OH CH,OH CH,OH OH HCN D(-)-赤藓糖 CHOH D(什+)甘油醛 CN COoH HOH H20 20HO+ H Na-Hg、HO+H H-OH H-+OH H-Oh CH,OH CHOH CHOH D(+)苏阿糖H * OH CHO CH2 OH HO * H CHO CH2 OH D-(+)-甘油醛 L-(-)-甘油醛 R-(+)-甘油醛 S-(-)-甘油醛 H * OH CHO CH2OH D-(+)-甘油醛 + HCN H OH CN H OH CH2OH H2 O H OH Na-Hg COOH H OH CH2OH H OH CHO H OH CH2OH HO H CN H OH CH2 OH H2 O HO H COOH H OH CH2 OH Na-Hg HO H CHO H OH CH2 OH D-(-)-赤藓糖 D-(+)-苏阿糖 单糖的构型以甘油醛为标准，最后一个手性碳与D-(+)-甘油醛相同就是D- 型糖，反之就是L-型糖