ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DO%29CC1OC%28%3DO%29/C%3DC/C%28%3DO%29CCC%28OC%28%3DO%29/C%3DC/C%28%3DO%29CC1%29CC%28%3DO%29C/file?format=sdf&get3d=True  -- CC%28%3DO%29CC1OC%28%3DO%29/C%3DC/C%28%3DO%29CCC%28OC%28%3DO%29/C%3DC/C%28%3DO%29CC1%29CC%28%3DO%29C could not be loaded.