ERROR opening https://cactus.nci.nih.gov/chemical/structure/COP%28%3DO%29%28OC%29SCN1C2%3DNC%3DC%28C%3DC2OC1%3DO%29Cl/file?format=sdf&get3d=True  -- COP%28%3DO%29%28OC%29SCN1C2%3DNC%3DC%28C%3DC2OC1%3DO%29Cl could not be loaded.