ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccc3c6c1cccc6C%3DC2c4cccc5cccc%28C%3DC23%29c45/file?format=sdf&get3d=True  -- c1ccc3c6c1cccc6C%3DC2c4cccc5cccc%28C%3DC23%29c45 could not be loaded.