ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%28%5BC%40%40H%5D%28CCC%28%3DC1%29C%29C%28C%29C%29%3DO/file?format=sdf&get3d=True  -- C1%28%5BC%40%40H%5D%28CCC%28%3DC1%29C%29C%28C%29C%29%3DO could not be loaded.