Showing structure for (1s,5r,10r,11s,18s)-5,11,18-trihydroxy-13-methoxy-5-methyl-19-oxapentacyclo[8.8.1.0¹,¹⁰.0²,⁷.0¹²,¹⁷]nonadeca-2(7),8,12(17),13,15-pentaen-3-one