ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BO-%5DCl%28%3DO%29%3DO.%5BO-%5DCl%28%3DO%29%3DO.%5BMn%2B2%5D.O.O.O.O.O.O/file?format=sdf&get3d=True  -- %5BO-%5DCl%28%3DO%29%3DO.%5BO-%5DCl%28%3DO%29%3DO.%5BMn%2B2%5D.O.O.O.O.O.O could not be loaded.