ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28C1%3DCC%28%3DCC%3DC1%29O%29C%28C%29CN%28C%29C.Cl/file?format=sdf&get3d=True  -- CCC%28C1%3DCC%28%3DCC%3DC1%29O%29C%28C%29CN%28C%29C.Cl could not be loaded.