(2R,3S)-3-[(E)-(2S,3S)-3-(tert-Butyl-dimethyl-silanyloxy)-2-(4-methoxy-benzyloxy)-5-((S)-4-methyl-3,6-dihydro-2H-pyran-2-yl)-pent-4-enyl]-oxirane-2-carbaldehyde

1-{3-[3-(tert-butyl-dimethyl-silanyloxy)-2-(4-methoxy-benzyloxy)-5-(4-methyl-3,6-dihydro-2H-pyran-2-yl)-pent-4-enyl]-oxiranyl}-3-(3-{6-[4-(4-methoxy-benzyloxy)-but-2-ynyl]-3,6-dihydro-2H-pyran-2-yl}-2-methyl-propyl)-but-3-en-1-ol