ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C20H18O4/c1-20(2)8-7-14-16(24-20)6-5-12-15-10-22-17-9-11(21)3-4-13(17)19(15)23-18(12)14/h3-9,15,19,21H,10H2,1-2H3/t15-,19-/m1/s1/file?format=sdf&get3d=True -- InChI=1S/C20H18O4/c1-20(2)8-7-14-16(24-20)6-5-12-15-10-22-17-9-11(21)3-4-13(17)19(15)23-18(12)14/h3-9,15,19,21H,10H2,1-2H3/t15-,19-/m1/s1 could not be loaded.