ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C15H12N4OS/c20-14-13(11-8-4-5-9-12(11)17-14)18-19-15(21)16-10-6-2-1-3-7-10/h1-9H,(H2,16,19,21)(H,17,18,20)/file?format=sdf&get3d=True -- InChI=1S/C15H12N4OS/c20-14-13(11-8-4-5-9-12(11)17-14)18-19-15(21)16-10-6-2-1-3-7-10/h1-9H,(H2,16,19,21)(H,17,18,20) could not be loaded.