dehydroisoandrosteron-3-yl 3,6-di-O-benzoyl-β-D-glucopyranoside 、
2,3,4-tri-O-acetyl-L-rhamnopyranosyl trichloroacetimidate 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
生成 [(2R,3R,4S,5R,6R)-4-benzoyloxy-6-[[(3S,8R,9S,10R,13S,14S)-10,13-dimethyl-17-oxo-1,2,3,4,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-yl]oxy]-3,5-bis[[(2S,3R,4R,5S,6S)-3,4,5-triacetyloxy-6-methyloxan-2-yl]oxy]oxan-2-yl]methyl benzoate