Showing structure for (1r,2r,5s,6s,10r,11s,12r,15r,16r,18s,19r)-16-(acetyloxy)-11-hydroxy-1,5,10,15-tetramethyl-6-[(3s)-oxolan-3-yl]-13-oxapentacyclo[10.6.1.0²,¹⁰.0⁵,⁹.0¹⁵,¹⁹]nonadec-8-en-18-yl 3-methylbut-2-enoate