Showing structure for (7r,17s,19s)-3,19-dihydroxy-7-phenyl-19-[(1e)-2-phenylethenyl]-8,12,18-trioxatetracyclo[15.3.1.0²,¹¹.0⁴,⁹]henicosa-2(11),3,9-triene-5,13-dione