(2R,3S)-4-hydroxy-2,3-dimethyl-2,3-dihydro-benzofuran-3-carbonitrile

(2R,3S)-2,3-dimethyl-4-triisopropylsilanyloxy-2,3-dihydro-benzofuran-3-carbonitrile

(2R,3S)-7-bromo-2,3-dimethyl-4-triisopropylsilanyloxy-2,3-dihydro-benzofuran-3-carbonitrile

(2E,4E)-5-((2R,3R)-7-bromo-2,3-dimethyl-4-triisopropylsilanyloxy-2,3-dihydrobenzofuran-3-yl)-2-methyl-penta-2,4-dienoic acid methyl ester

(2R,3R)-7-bromo-3-[(1E,3E)-(tert-butyl-dimethyl-silanyloxy)-4-methyl-penta-1,3-dienyl]-2,3-dimethyl-4-triisopropylsilanyloxy-2,3-dihydro-benzofuran