2-Amino-3-hydroxy-succinic acid 1-ethyl ester 4-methyl ester 、
甲酸乙酯 反应 5.5h,
生成 (2S,3S)-2-Formylamino-3-hydroxy-succinic acid 1-ethyl ester 4-methyl ester 、 (2R,3R)-2-Formylamino-3-hydroxy-succinic acid 1-ethyl ester 4-methyl ester 、
(2S,3R)-2-Formylamino-3-hydroxy-succinic acid 1-ethyl ester 4-methyl ester