乙酸酐 、
3,16-di-O-β-D-glucopyranosylcholest-5-en-23-one-3β,7β,16β-triol 在
吡啶 、
4-二甲氨基吡啶 作用下,
以5.1 mg的产率得到[(2R,3R,4S,5R,6R)-3,4,5-triacetyloxy-6-[[(3S,7R,8S,9S,10R,13S,14S,16S,17R)-7-acetyloxy-10,13-dimethyl-17-[(2R)-6-methyl-4-oxoheptan-2-yl]-16-[(2R,3R,4S,5R,6R)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl]oxy]oxan-2-yl]methyl acetate