Showing structure for (3s,5r,15s,16r,17r)-15-hydroxy-4,4,16,17-tetramethyl-9-phenyl-6,12,18-trioxapentacyclo[12.4.0.0²,⁷.0³,⁵.0⁸,¹³]octadeca-1,7,9,13-tetraen-11-one