O,O'-dicyclobutanecarbonyl (1,2-ethylene) bispilocarpic acid diester 在
phosphate buffer 作用下,
生成 Cyclobutanecarboxylic acid (2R,3S)-3-{2-[(2S,3R)-2-ethyl-3-hydroxymethyl-4-(3-methyl-3H-imidazol-4-yl)-butyryloxy]-ethoxycarbonyl}-2-(3-methyl-3H-imidazol-4-ylmethyl)-pentyl ester