若为L型糖,则分别为 CHO COOH COOH CHO COOH CH2OH cOo COOH H2OH COOH B D E 反应过程 COOH CHO OOH 氧化 COOH CH,OH COOH COOH 氧化 CH2OH COOH CH=NNHPh COOH (3 COOH (4) CH2OH C=NNHPh HoH CH2OH COOH CH2OH 3.(1)HO- OH DCH若为 L 型糖，则分别为： 反应过程： CHO CH2OH CHO CH2OH COOH COOH COOH COOH COOH COOH A B C D E CHO CH2OH CHO CH2OH COOH COOH COOH COOH COOH COOH A B C D E 氧化 递降 氧化 氧化 C=NNHPh CH2OH (1) CH=NNHPh CH2OH (2) COOH COOH COOH (3) CH2OH 2. (4) CH2OH O OH OH OH OH O OH OH OH 3. (1) HO (2) HO OCH3