ERROR opening https://cactus.nci.nih.gov/chemical/structure/N%23CCC%28C1CCCC1%29n1cc%28-c2ncnc3%5BnH%5Dccc23%29cn1/file?format=sdf&get3d=True  -- N%23CCC%28C1CCCC1%29n1cc%28-c2ncnc3%5BnH%5Dccc23%29cn1 could not be loaded.