ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C28H32N4/c1-7-17-29-25-15-21-31(27-13-5-3-11-23(25)27)19-9-2-10-20-32-22-16-26(30-18-8-1)24-12-4-6-14-28(24)32/h3-6,11-16,21-22H,1-2,7-10,17-20H2/p+2/file?format=sdf&get3d=True  -- InChI=1S/C28H32N4/c1-7-17-29-25-15-21-31(27-13-5-3-11-23(25)27)19-9-2-10-20-32-22-16-26(30-18-8-1)24-12-4-6-14-28(24)32/h3-6,11-16,21-22H,1-2,7-10,17-20H2/p+2 could not be loaded.