ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%5C1c3c%28O/C%3DC/1c2ccccc2%29cc%28OC%29cc3C/file?format=sdf&get3d=True  -- O%3DC%5C1c3c%28O/C%3DC/1c2ccccc2%29cc%28OC%29cc3C could not be loaded.