Showing structure for (1r,2r,3r,4s,7r,8z,12r,13r,14r,16s,17s)-2,14-bis(acetyloxy)-3,16-dihydroxy-4,9,13,17-tetramethyl-5-oxo-6-oxatricyclo[11.4.0.0³,⁷]heptadec-8-en-12-yl acetate