ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C19H14N4/c1-3-14-10-16-5-7-18(22-16)19-8-6-17(23-19)11-15-4-2-13(21-15)9-12(1)20-14/h1-11,20-22H/file?format=sdf&get3d=True -- InChI=1S/C19H14N4/c1-3-14-10-16-5-7-18(22-16)19-8-6-17(23-19)11-15-4-2-13(21-15)9-12(1)20-14/h1-11,20-22H could not be loaded.