ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%28C%29CC1%3DNC2%3DC%28C%3DC1%29C%28%3DCC%28%3DC2O%29Cl%29Cl/file?format=sdf&get3d=True  -- CN%28C%29CC1%3DNC2%3DC%28C%3DC1%29C%28%3DCC%28%3DC2O%29Cl%29Cl could not be loaded.