Toluene-4-sulfonic acid (2R,3R)-3-hydroxy-4-methyl-2-vinyl-pentyl ester

[2R,3R,4S,5R,6R,7S]-4-[(tert-butyldimethylsilyl)oxy]-3,5-dimethyl-7-methoxy-6-[(triethylsilyl)oxy]-8-nonen-2-ol