O2,O3,O4-triacetyl-O1-(17-oxo-androsta-3,5-dien-3-yl)-β-D-glucopyranuronic acid methyl ester 在
甲醇 、
sodium methylate 作用下,
生成 (2S,3S,4S,5R,6S)-6-(10,13-Dimethyl-17-oxo-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yloxy)-3,4,5-trihydroxy-tetrahydro-pyran-2-carboxylic acid