Showing structure for (1r,2s,5s,6r,9s,10s,13s,15r,16s)-6-ethyl-15,16-dihydroxy-5-methyl-17-oxapentacyclo[14.2.1.0¹,¹³.0²,¹⁰.0⁵,⁹]nonadecan-7-one