ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BNa%2B%5D.O%3DC%28%5BO-%5D%29%5BC%40%40H%5D%28N%29CCC%28%3DO%29O/file?format=sdf&get3d=True -- %5BNa%2B%5D.O%3DC%28%5BO-%5D%29%5BC%40%40H%5D%28N%29CCC%28%3DO%29O could not be loaded.