ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCN%28CCc1c%5BnH%5Dc2cccc%28O%29c12%29CC%28C%29C/file?format=sdf&get3d=True  -- CCN%28CCc1c%5BnH%5Dc2cccc%28O%29c12%29CC%28C%29C could not be loaded.