ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BNH4%2B%5D.O.Cl%5BAu-%5D%28Cl%29%28Cl%29Cl/file?format=sdf&get3d=True  -- %5BNH4%2B%5D.O.Cl%5BAu-%5D%28Cl%29%28Cl%29Cl could not be loaded.