ERROR opening https://cactus.nci.nih.gov/chemical/structure/NH4%20.NH4%20.ClPt-2%28Cl%29%28Cl%29%28Cl%29%28Cl%29Cl/file?format=sdf&get3d=True  -- NH4%20.NH4%20.ClPt-2%28Cl%29%28Cl%29%28Cl%29%28Cl%29Cl could not be loaded.