ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC3N2%5CC%28%3DC%28%5CS%5BC%40H%5D1C%5BC%40%40H%5D%28C%28%3DO%29N%28C%29C%29NC1%29%5BC%40H%5D%28C%29%5BC%40%40H%5D2%5BC%40H%5D3%5BC%40H%5D%28O%29C%29C%28%3DO%29O/file?format=sdf&get3d=True -- O%3DC3N2%5CC%28%3DC%28%5CS%5BC%40H%5D1C%5BC%40%40H%5D%28C%28%3DO%29N%28C%29C%29NC1%29%5BC%40H%5D%28C%29%5BC%40%40H%5D2%5BC%40H%5D3%5BC%40H%5D%28O%29C%29C%28%3DO%29O could not be loaded.