ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%5BC%40%5D3%28/C%3DC2/c4cccc1c4c%28cn1%29C%5BC%40H%5D2N%28C3%29C%29C/file?format=sdf&get3d=True  -- O%5BC%40%5D3%28/C%3DC2/c4cccc1c4c%28cn1%29C%5BC%40H%5D2N%28C3%29C%29C could not be loaded.