ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCCCCCCCCCCCCCC%5Bn%2B%5D1ccccc1.%5BCl-%5D/file?format=sdf&get3d=True  -- CCCCCCCCCCCCCCCC%5Bn%2B%5D1ccccc1.%5BCl-%5D could not be loaded.