Showing structure for (1s,3r,8s,10s,11r,12s,15s,17s)-15-hydroxy-5,12,16,16-tetramethyl-2,7,9-trioxahexacyclo[9.8.0.0¹,³.0⁴,⁸.0⁸,¹⁰.0¹²,¹⁷]nonadec-4-en-6-one