ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1C2%3DC%28C%28C3%3DCC%3DCC%3DC3%29%3DNC%28O%29C1%3DO%29C%3DC%28Cl%29C%3DC2/file?format=sdf&get3d=True  -- CN1C2%3DC%28C%28C3%3DCC%3DCC%3DC3%29%3DNC%28O%29C1%3DO%29C%3DC%28Cl%29C%3DC2 could not be loaded.