ERROR opening https://cactus.nci.nih.gov/chemical/structure/%26%2391%3BNi%26%2393%3B%23%26%2391%3BSb%26%2393%3B/file?format=sdf&get3d=True  -- %26%2391%3BNi%26%2393%3B%23%26%2391%3BSb%26%2393%3B could not be loaded.