ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28O%29c1cc%28ccc1O%29/N%3DN/c2cc%28C%28O%29%3DO%29c%28O%29cc2/file?format=sdf&get3d=True  -- O%3DC%28O%29c1cc%28ccc1O%29/N%3DN/c2cc%28C%28O%29%3DO%29c%28O%29cc2 could not be loaded.