ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1%28c%28cccc1%29C%28O%29%3DO%29%5CN%3DN%5Cc1ccc%28N%28C%29C%29cc1/file?format=sdf&get3d=True  -- c1%28c%28cccc1%29C%28O%29%3DO%29%5CN%3DN%5Cc1ccc%28N%28C%29C%29cc1 could not be loaded.