(2R,3S,4aR,5aS,6aR,8S,9R,10aS,11aR,12aS)-9-Benzyloxy-8-(2-benzyloxy-ethyl)-2-hydroxymethyl-5a,11a-dimethoxy-2-methyl-tetradecahydro-1,5,7,11-tetraoxa-naphthacen-3-ol

(4aR,6S,7R,8aS)-6-{4-[(2R,3S,5R,6S)-5-Benzyloxy-6-(2-benzyloxy-ethyl)-3-(tert-butyl-dimethyl-silanyloxy)-tetrahydro-pyran-2-yl]-but-2-ynyl}-7-(tert-butyl-dimethyl-silanyloxy)-2,2,4a-trimethyl-hexahydro-pyrano[3,2-d][1,3]dioxine

tert-Butyl-dimethyl-((4aR,6S,7R,8aS)-2,2,4a-trimethyl-6-prop-2-ynyl-hexahydro-pyrano[3,2-d][1,3]dioxin-7-yloxy)-silane

(4aR,6S,7R,8aS)-7-(tert-Butyl-dimethyl-silanyloxy)-2,2,4a-trimethyl-6-(3-trimethylsilanyl-prop-2-ynyl)-hexahydro-pyrano[3,2-d][1,3]dioxine