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