(3Z,9E)-(1R,7S,15S,17R)-7-[(E)-(S)-1-(tert-Butyl-dimethyl-silanyloxy)-3-((S)-4-methyl-3,6-dihydro-2H-pyran-2-yl)-allyl]-15-methyl-13-methylene-6,21-dioxa-bicyclo[15.3.1]henicosa-3,9,19-triene-5,11-dione

ER-809537

ER-807318

12-[1-(tert-butyl-dimethyl-silanyloxy)-3-(4-methyl-3,6-dihydro-2H-pyran-2-yl)-allyl]-7-hydroxy-3-methyl-5-methylene-9,13,22-trioxa-tricyclo[16.3.1.08,10]docosa-15,19-dien-14-one

Acetic acid (Z)-(1R,3S,7S,8R,10S,12S,18R)-12-[(E)-(S)-1-(tert-butyl-dimethyl-silanyloxy)-3-((S)-4-methyl-3,6-dihydro-2H-pyran-2-yl)-allyl]-3-methyl-5-methylene-14-oxo-9,13,22-trioxa-tricyclo[16.3.1.08,10]docosa-15,19-dien-7-yl ester