ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C20H16N2O2/c1-11-6-9-17(12(2)10-11)22-19(23)14-5-3-4-13-16(21)8-7-15(18(13)14)20(22)24/h3-10H,21H2,1-2H3/file?format=sdf&get3d=True  -- InChI=1S/C20H16N2O2/c1-11-6-9-17(12(2)10-11)22-19(23)14-5-3-4-13-16(21)8-7-15(18(13)14)20(22)24/h3-10H,21H2,1-2H3 could not be loaded.