ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1O%5BC%40H%5D2/C%3DC%28%5CCC%5BC%40H%5D2%5BC%40%40H%5D1C%29C/file?format=sdf&get3d=True -- O%3DC1O%5BC%40H%5D2/C%3DC%28%5CCC%5BC%40H%5D2%5BC%40%40H%5D1C%29C could not be loaded.