Showing structure for (1r,2r,10r,11s,14r,15r,16s)-16-[(2r)-4,5-dimethyl-6-oxo-2,3-dihydropyran-2-yl]-10,14,16-trimethyl-17-oxapentacyclo[13.2.2.0¹,¹⁴.0²,¹¹.0⁵,¹⁰]nonadeca-4,6-dien-9-one