Showing structure for (1r,5r,17r,19r)-9,19-dihydroxy-5-phenyl-19-[(1e)-2-phenylethenyl]-4,12,18-trioxatetracyclo[15.3.1.0²,¹¹.0³,⁸]henicosa-2(11),3(8),9-triene-7,13-dione