ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%5BC%40%40H%5D3CCc2%5BnH%5Dc1ccc%28C%28N%29%3DO%29cc1c2C3/file?format=sdf&get3d=True  -- CN%5BC%40%40H%5D3CCc2%5BnH%5Dc1ccc%28C%28N%29%3DO%29cc1c2C3 could not be loaded.