ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28N%5BC%40H%5D%28Cc1ccccc1%29C%29%5BC%40%40H%5D%28N%29CCCCN/file?format=sdf&get3d=True  -- O%3DC%28N%5BC%40H%5D%28Cc1ccccc1%29C%29%5BC%40%40H%5D%28N%29CCCCN could not be loaded.