ERROR opening https://cactus.nci.nih.gov/chemical/structure/N1C%28C%28%3DC%5BC%40H%5D1O%29C%29%3DO/file?format=sdf&get3d=True -- N1C%28C%28%3DC%5BC%40H%5D1O%29C%29%3DO could not be loaded.