ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C28H26N4O3/c33-25-28(26(34)32(27(35)29-25)18-20-9-3-1-4-10-20)17-21-11-7-8-14-23(21)31-16-15-30(19-24(28)31)22-12-5-2-6-13-22/h1-14,24H,15-19H2,(H,29,33,35)/t24?,28-/m1/s1/file?format=sdf&get3d=True  -- InChI=1S/C28H26N4O3/c33-25-28(26(34)32(27(35)29-25)18-20-9-3-1-4-10-20)17-21-11-7-8-14-23(21)31-16-15-30(19-24(28)31)22-12-5-2-6-13-22/h1-14,24H,15-19H2,(H,29,33,35)/t24?,28-/m1/s1 could not be loaded.