ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/ClHO4/c2-1%283%2C4%295/h%28H%2C2%2C3%2C4%2C5%29/p-1/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/ClHO4/c2-1%283%2C4%295/h%28H%2C2%2C3%2C4%2C5%29/p-1 could not be loaded.