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