ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1C%28CCC1%26%2361%3BO%29C2%26%2361%3BCN%26%2361%3BCC%26%2361%3BC2/file?format=sdf&get3d=True  -- CN1C%28CCC1%26%2361%3BO%29C2%26%2361%3BCN%26%2361%3BCC%26%2361%3BC2 could not be loaded.