ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/ClH.H4N2/c;1-2/h1H;1-2H2/file?format=sdf&get3d=True -- InChI=1S/ClH.H4N2/c;1-2/h1H;1-2H2 could not be loaded.