ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28O%29C1%3DC%28O%29C%28C%29%3DC%28OC%28C2%3DC%28OC%29C%28C%29%3DC%28OC%29C%3DC2C%29%3DO%29C%3DC1C/file?format=sdf&get3d=True -- O%3DC%28O%29C1%3DC%28O%29C%28C%29%3DC%28OC%28C2%3DC%28OC%29C%28C%29%3DC%28OC%29C%3DC2C%29%3DO%29C%3DC1C could not be loaded.