ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C20H24N6O4/c1-4-30-20(28)25-16-9-15(21)17-18(24-16)22-10-13(23-17)11-26(2)14-7-5-12(6-8-14)19(27)29-3/h5-9H,4,10-11H2,1-3H3,(H4,21,22,24,25,28)/file?format=sdf&get3d=True  -- InChI=1S/C20H24N6O4/c1-4-30-20(28)25-16-9-15(21)17-18(24-16)22-10-13(23-17)11-26(2)14-7-5-12(6-8-14)19(27)29-3/h5-9H,4,10-11H2,1-3H3,(H4,21,22,24,25,28) could not be loaded.