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