Showing structure for (1r,2r,4s,5s,6s,10r,11s,15r,16r,18s,19r)-4,18-bis(acetyloxy)-16-hydroxy-1,5,10,15-tetramethyl-6-(5-oxooxolan-3-yl)-13-oxapentacyclo[10.6.1.0²,¹⁰.0⁵,⁹.0¹⁵,¹⁹]nonadec-8-en-11-yl (2e)-3,4-dimethylpent-2-enoate