[(1S,3S,5R,9R,10R,11R,13R,14S,15R,17S,18S,19R,23Z,25R,27S,29R,31S,33S,36S,37S,38R,41S,43S,49S)-37-acetyloxy-17,27-bis[[tert-butyl(dimethyl)silyl]oxy]-11-[(4S,5E)-4-[tert-butyl(dimethyl)silyl]oxy-7-chloro-2-methylideneocta-5,7-dienyl]-10-hydroxy-15,31-dimethoxy-18,36,38,43,49-pentamethyl-39-methylidene-7,35-dioxo-14,43-bis(triethylsilyloxy)-8,12,45,46,47,48,50-heptaoxaheptacyclo[39.3.1.11,5.19,13.115,19.125,29.129,33]pentacont-23-en-3-yl] acetate | 1061360-77-7