ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%5BC%40H%5D%28C%5BC%40H%5D%28C%3DC%28C%29C%29O%29%5BC%40H%5D1CC%5BC%40%40%5D2%28%5BC%40%40%5D1%28CC%5BC%40%40%5D3%28%5BC%40H%5D2%5BC%40H%5D%28C%3DC4%5BC%40H%5D3CC%5BC%40%40H%5D%28%5BC%40%5D4%28C%29CO%29O%29O%29C%29C%29C/file?format=sdf&get3d=True -- C%5BC%40H%5D%28C%5BC%40H%5D%28C%3DC%28C%29C%29O%29%5BC%40H%5D1CC%5BC%40%40%5D2%28%5BC%40%40%5D1%28CC%5BC%40%40%5D3%28%5BC%40H%5D2%5BC%40H%5D%28C%3DC4%5BC%40H%5D3CC%5BC%40%40H%5D%28%5BC%40%5D4%28C%29CO%29O%29O%29C%29C%29C could not be loaded.