ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28O%29C%28OC1C%3DCC%3DC%28C%28%3DO%29O%29C1O%29%3DC/file?format=sdf&get3d=True  -- O%3DC%28O%29C%28OC1C%3DCC%3DC%28C%28%3DO%29O%29C1O%29%3DC could not be loaded.