ERROR opening https://cactus.nci.nih.gov/chemical/structure/S3c1ccccc1/C%28c2c%28cccc2%29C3%29%3DC5/CC4N%28C%29C%28CC4%29C5/file?format=sdf&get3d=True  -- S3c1ccccc1/C%28c2c%28cccc2%29C3%29%3DC5/CC4N%28C%29C%28CC4%29C5 could not be loaded.