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