7-allyl-6-[5-benzyloxy-7-(3-benzyloxy-propyl)-10a-methyl-2-vinyl-decahydro-1,8,10-trioxa-anthracen-3-yloxy]-4a,7,10a-trimethyl-2-phenyl-octahydro-1,3,8,10-tetraoxa-anthracene

[8-benzyloxy-6-(3-benzyloxy-propyl)-3-(tert-butyl-dimethyl-silanyloxy)-8a-methyl-octahydro-pyrano[3,2-b]pyran-2-yl]-acetic acid 7-allyl-4a,7,10a-trimethyl-2-phenyl-octahydro-1,3,8,10-tetraoxa-anthracen-6-yl ester