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