ERROR opening https://cactus.nci.nih.gov/chemical/structure/P%28%3DO%29%28N%3DC%28N%28CC%29CC%29C%29%28OCC%29F/file?format=sdf&get3d=True  -- P%28%3DO%29%28N%3DC%28N%28CC%29CC%29C%29%28OCC%29F could not be loaded.