ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCO%26%2391%3BSi%26%2393%3B%28OCC%29%28OCC%29OCC/file?format=sdf&get3d=True  -- CCO%26%2391%3BSi%26%2393%3B%28OCC%29%28OCC%29OCC could not be loaded.