ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC1%26%2361%3BCC%26%2361%3BCC%26%2361%3BC1/file?format=sdf&get3d=True  -- CCC1%26%2361%3BCC%26%2361%3BCC%26%2361%3BC1 could not be loaded.