Showing structure for (1r,5s,7r,13r,20r)-5,11-dihydroxy-10,13,14,15-tetramethoxy-7,20-diphenyl-2,8,21-trioxapentacyclo[11.8.0.0¹,¹⁷.0³,¹².0⁴,⁹]henicosa-3,9,11,14,17-pentaen-16-one