ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1C2C1%28CNC2%29C3%3DCC%28%3DC%28C%3DC3%29Cl%29Cl/file?format=sdf&get3d=True  -- C1C2C1%28CNC2%29C3%3DCC%28%3DC%28C%3DC3%29Cl%29Cl could not be loaded.