(S)-8-(tert-Butyl-diphenyl-silanyloxy)-3-isopropenyl-13-(4-methoxy-benzyloxy)-10-methoxymethoxy-10-methyl-trideca-6,11-diynoic acid methyl ester

[(S)-9-(tert-Butyl-diphenyl-silanyloxy)-14-hydroxy-4-isopropenyl-11-methoxymethoxy-1,11-dimethyl-2-oxo-tetradeca-7,12-diynyl]-phosphonic acid dimethyl ester