(4R,6R,7S,11R)methyl 2,6-anhydro-5,9,11,13,14,15-hexadeoxy-10-O-[(1,1-dimethylethyl)dimethylsilyl]-3,4,7-tris-O-[(4-methoxyphenyl)methyl]-5,11-dimethyl-α-D-xylo-D-threo-L-gulo-8-hexadeculo-8,12-pyranoside 、
(S)-bromo-4-tert-butyldimethylsiloxy-5-triethylsiloxy-1-pentene 以87%的产率得到4-[(2R,3S,4S,6R)-4-[tert-butyl(dimethyl)silyl]oxy-6-[(S)-[(2R,3R,4R,5S,6R)-6-[(1S,4S)-4-[tert-butyl(dimethyl)silyl]oxy-1-hydroxy-2-methylidene-5-triethylsilyloxypentyl]-4,5-bis[(4-methoxyphenyl)methoxy]-3-methyloxan-2-yl]-[(4-methoxyphenyl)methoxy]methyl]-6-methoxy-3-methyloxan-2-yl]butyl 2,2-dimethylpropanoate