ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/CH5N3.CHNS/c2-1(3)4;2-1-3/h(H5,2,3,4);3H/file?format=sdf&get3d=True  -- InChI=1S/CH5N3.CHNS/c2-1(3)4;2-1-3/h(H5,2,3,4);3H could not be loaded.