ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccccc1N2N%28C%29C%28C%29%3DC%28C2%3DO%29NC%28%3DO%29c3cccnc3/file?format=sdf&get3d=True  -- c1ccccc1N2N%28C%29C%28C%29%3DC%28C2%3DO%29NC%28%3DO%29c3cccnc3 could not be loaded.