(3Z,9E)-(1R,7S,11S,15S,17R)-11-(tert-Butyl-dimethyl-silanyloxy)-7-(tert-butyl-diphenyl-silanyloxymethyl)-15-methyl-13-methylene-6,21-dioxa-bicyclo[15.3.1]henicosa-3,9,19-trien-5-one

(3Z,9E,14E)-(1R,7S,11S,17S)-11-(tert-Butyl-dimethyl-silanyloxy)-7-(tert-butyl-diphenyl-silanyloxymethyl)-6,21-dioxa-bicyclo[15.3.1]henicosa-3,9,14,19-tetraene-5,13-dione

(Z)-4-{(2R,6S)-6-[(2E,7E)-(R)-6-(tert-Butyl-dimethyl-silanyloxy)-11-(tert-butyl-diphenyl-silanyloxy)-10-(4-methoxy-benzyloxy)-4-oxo-undeca-2,7-dienyl]-5,6-dihydro-2H-pyran-2-yl}-but-2-enoic acid methyl ester

(Z)-4-{(2R,6S)-6-[(2E,7E)-(R)-6-(tert-Butyl-dimethyl-silanyloxy)-11-(tert-butyl-diphenyl-silanyloxy)-10-(4-methoxy-benzyloxy)-4-oxo-undeca-2,7-dienyl]-5,6-dihydro-2H-pyran-2-yl}-but-2-enoic acid