3β-[(O-β-D-glucopyranosyl)(1->4)-O-β-D-glucopyranosyl)(1->6)-β-D-glucopyranosyl)oxy)]-17α-hydroxy-16β-[(O-β-D-xylopyranosyl)-(1->3)-2-O-acetyl-α-L-arabinopyranosyl)oxy]cholest-5-en-22-one 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 3.0h,
以39.7 mg的产率得到(2S)-2-[(3S,8R,9S,10R,13S,14S,16S,17S)-3-[(2R,3R,4S,5S,6R)-6-[[(2R,3R,4R,5S,6R)-3,4-dihydroxy-6-(hydroxymethyl)-5-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxymethyl]-3,4,5-trihydroxyoxan-2-yl]oxy-16-[(2S,3R,4S,5S)-3,5-dihydroxy-4-[(2S,3R,4S,5R)-3,4,5-trihydroxyoxan-2-yl]oxyoxan-2-yl]oxy-17-hydroxy-10,13-dimethyl-1,2,3,4,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-yl]-6-methylheptan-3-one