[(2R,6R,7R,12R,13S,14S,16S)-16-[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]oxy-14-hydroxy-4,4,7,17,18,18-hexamethyl-3,5-dioxatetracyclo[12.3.1.02,6.07,12]octadeca-1(17),10-dien-13-yl] benzoate 在
甲醇 、
对甲苯磺酸 作用下,
反应 3.0h,
以80%的产率得到Benzoic acid (1S,2S,3R,8R,9R,10R,13S)-13-((2R,3S)-3-benzoylamino-2-hydroxy-3-phenyl-propionyloxy)-1,9,10-trihydroxy-8,12,15,15-tetramethyl-tricyclo[9.3.1.0
3,8]pentadeca-4,11-dien-2-yl ester