ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C18H22N2/c1-14(2)13-15(3)19-17-9-11-18(12-10-17)20-16-7-5-4-6-8-16/h4-12,14-15H,13H2,1-3H3/b19-17-,20-18?/file?format=sdf&get3d=True  -- InChI=1S/C18H22N2/c1-14(2)13-15(3)19-17-9-11-18(12-10-17)20-16-7-5-4-6-8-16/h4-12,14-15H,13H2,1-3H3/b19-17-,20-18? could not be loaded.