ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC%28%3DO%29C%3DCc1cc%28O%29cc%28O%29c1/file?format=sdf&get3d=True  -- OC%28%3DO%29C%3DCc1cc%28O%29cc%28O%29c1 could not be loaded.