ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC4CCC%5C1%3DC%28%5CCC%5BC%40%40H%5D2%5BC%40%40H%5D/1CC%5BC%40%5D3%28%5BC%40H%5D2CC%5BC%40%5D3%28C%23C%29O%29C%29C4/file?format=sdf&get3d=True -- O%3DC4CCC%5C1%3DC%28%5CCC%5BC%40%40H%5D2%5BC%40%40H%5D/1CC%5BC%40%5D3%28%5BC%40H%5D2CC%5BC%40%5D3%28C%23C%29O%29C%29C4 could not be loaded.