二甲基亚砜 、
diosgenin diglucoside 在
sodium hydride 作用下,
生成 (1S,2S,4S,5'R,6R,7S,8R,9S,12S,13R,16S)-16-[(2R,3R,4S,5R,6R)-3,4-dimethoxy-6-(methoxymethyl)-5-[(2S,3R,4S,5R,6R)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-ene-6,2'-oxane]