(1R,2S,3S,5S,6R,7S)-4,10-dioxa-3-[3''-methoxy-5''-(2'''-t-butyldimethylsilyloxyethanesulfanyl)-4''-propoxy]-5-[(3',4',5')-trimethoxyphenyl]-tricyclo[5.2.1.02,6]dec-8-en-3-ol