(5R,8R,9R,10R,12R,13R,14R,17S)-12-hydroxy-17-(2-hydroxy-6-methylhept-5-en-2-yl)-4,4,8,10,14-pentamethylhexadecahydro-3H-cyclopenta[a]phenanthren-3-one 在
sodium tetrahydroborate 、
silver(l) oxide 作用下,
以
二氯甲烷 、
异丙醇 为溶剂,
生成
20-O-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)dammar-24-ene-3β,12β,20(S)-triol