ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CC%28%3DO%29NC%28%3DO%29%5BC%40H%5D1N2CC3%3DC%28C2%3DO%29C%3DCC%3DC3OCC4%3DCC%3DC%28C%3DC4%29CN5CCOCC5/file?format=sdf&get3d=True  -- C1CC%28%3DO%29NC%28%3DO%29%5BC%40H%5D1N2CC3%3DC%28C2%3DO%29C%3DCC%3DC3OCC4%3DCC%3DC%28C%3DC4%29CN5CCOCC5 could not be loaded.