ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1C%28%3DO%29C%28%3DO%29C%28%3DO%29C%28%3DO%29C%28%3DO%291/file?format=sdf&get3d=True -- O%3DC1C%28%3DO%29C%28%3DO%29C%28%3DO%29C%28%3DO%29C%28%3DO%291 could not be loaded.