(2S,3S)-4-[(E)-(S)-5-Carboxy-1-methyl-hex-2-en-(E)-ylidene]-3-methoxycarbonylmethyl-pyrrolidine-1,2-dicarboxylic acid 1-methyl ester 在
甲醇 、
水 、 sodium hydroxide 作用下,
生成
(2S,3S,5'S)-3-carboxymethyl-4-(5-carboxy-1-methyl-hex-2-enylidene)pyrrolidine-2-carboxylic acid