Showing structure for (7s,8r,12r,19s,20r)-7-hydroxy-17-methoxy-7,15,19,20-tetramethyl-3,5,11-trioxapentacyclo[10.7.1.0²,⁶.0⁸,²⁰.0¹⁴,¹⁹]icos-16-ene-10,18-dione