ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DO%29CC%28c1ccccc1%29C2%3DC%28O%29c3ccccc3OC2%3DO/file?format=sdf&get3d=True  -- CC%28%3DO%29CC%28c1ccccc1%29C2%3DC%28O%29c3ccccc3OC2%3DO could not be loaded.