ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DO%29Oc1cccc2c1c%28c%5BnH%5D2%29CCN%28CC%3DC%29CC%3DC/file?format=sdf&get3d=True  -- CC%28%3DO%29Oc1cccc2c1c%28c%5BnH%5D2%29CCN%28CC%3DC%29CC%3DC could not be loaded.