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