ERROR opening https://cactus.nci.nih.gov/chemical/structure/c2cc%28OC%29ccc2CCc1cc%28O%29cc%28OC%29c1C%28O%29%3DO/file?format=sdf&get3d=True  -- c2cc%28OC%29ccc2CCc1cc%28O%29cc%28OC%29c1C%28O%29%3DO could not be loaded.