<3aS-<3aα,4α,7aα,7α(2E,4S*,5R*)>>-tetrahydro-2,2-dimethyl-4-<2-<<(1,1-dimethylethyl)diphenylsilyl>oxy>ethyl>-7-<5-<<(1,1-dimethylethyl)dimethylsilyl>oxy>-4-methyl-2-hexenyl>-4H-1,3-dioxolo<4,5-c>pyran

1-{(3aS,4R,7S,7aR)-7-[(E)-(4R,5S)-5-(tert-Butyl-dimethyl-silanyloxy)-4-methyl-hex-2-enyl]-2,2-dimethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyran-4-yl}-propan-2-one

(2R,3S)-(+)-1-bromo-2-methylbutan-3-ol t-butyldiphenylsilylether