ERROR opening https://cactus.nci.nih.gov/chemical/structure/FC%28F%29%28F%29c4cccc%28/C3%3DC/CN%28CCc2cc1ccccc1cc2%29CC3%29c4/file?format=sdf&get3d=True  -- FC%28F%29%28F%29c4cccc%28/C3%3DC/CN%28CCc2cc1ccccc1cc2%29CC3%29c4 could not be loaded.