2,3,4,6-tetra-O-benzyl-D-galactopyranosyl fluoride 、
3β,20α-dihydroxypregn-5-ene-bis-TMS ester 生成 (2R,3R,4S,5S,6R)-2-[(1R)-1-[(3S,8S,9S,10R,13S,14S,17S)-10,13-dimethyl-3-[(2R,3R,4S,5S,6R)-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxy-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]ethoxy]-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxane