(2R,4S,4aS,5aR,9R,10aS,11aR)-4-Benzyloxy-2-(3-benzyloxy-propyl)-9-hydroxymethyl-5a-methyl-decahydro-1,5,10-trioxa-cyclohepta[b]naphthalen-8-one

(2R,4S,4aS,5aR,8S,9R,10aS,11aR)-4-Benzyloxy-2-(3-benzyloxy-propyl)-9-[(2R,3S)-3-[3-(tert-butyl-diphenyl-silanyloxy)-propyl]-2-(toluene-4-sulfonyl)-oxiranylmethyl]-5a-methyl-dodecahydro-1,5,10-trioxa-cyclohepta[b]naphthalen-8-ol