ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C16H24N2O4/c1-16(2,3)17-8-10(19)9-22-13-6-5-12(20)15-11(13)4-7-14(21)18-15/h5-6,10,17,19-20H,4,7-9H2,1-3H3,(H,18,21)/file?format=sdf&get3d=True  -- InChI=1S/C16H24N2O4/c1-16(2,3)17-8-10(19)9-22-13-6-5-12(20)15-11(13)4-7-14(21)18-15/h5-6,10,17,19-20H,4,7-9H2,1-3H3,(H,18,21) could not be loaded.