Showing structure for (1s)-1-[(1'e,2s,6'r,11'r,13'r,15's,16'r,19'z,21'e,23'r,27's)-27'-(acetyloxy)-9',15'-dimethyl-3',18'-dioxo-4',12',17',24'-tetraoxaspiro[oxirane-2,14'-pentacyclo[21.3.1.1¹³,¹⁶.0⁶,¹¹.0⁶,¹⁵]octacosane]-1',9',19',21'-tetraen-23'-yl]ethyl acetate