ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%28%5BC%40H%5D%28CN1CC%5BC%40%40H%5D%28C1%29O%29C2%3DCC%3DCC%3DC2%29C%28%3DO%29C%28C3%3DCC%3DCC%3DC3%29C4%3DCC%3DCC%3DC4/file?format=sdf&get3d=True  -- CN%28%5BC%40H%5D%28CN1CC%5BC%40%40H%5D%28C1%29O%29C2%3DCC%3DCC%3DC2%29C%28%3DO%29C%28C3%3DCC%3DCC%3DC3%29C4%3DCC%3DCC%3DC4 could not be loaded.