ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C18H18N2O/c1-14(12-15(2)21)20-18-10-8-17(9-11-18)19-13-16-6-4-3-5-7-16/h3-13,20H,1-2H3/b14-12?,19-13+/file?format=sdf&get3d=True  -- InChI=1S/C18H18N2O/c1-14(12-15(2)21)20-18-10-8-17(9-11-18)19-13-16-6-4-3-5-7-16/h3-13,20H,1-2H3/b14-12?,19-13+ could not be loaded.