ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1cc%28ccc1%29%5CC%3DC%5CC%28c1ccccc1%29%3DO/file?format=sdf&get3d=True  -- c1cc%28ccc1%29%5CC%3DC%5CC%28c1ccccc1%29%3DO could not be loaded.