4-O-acetylwithanolide D 在
三正丁基氢锡 作用下,
以51%的产率得到(R)-6-[(R)-1-Hydroxy-1-((5S,6R,8S,9S,10R,13S,14S,17S)-6-hydroxy-10,13-dimethyl-1-oxo-2,5,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-ethyl]-3,4-dimethyl-5,6-dihydro-pyran-2-one