ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28CC%29C1%28CCN%28C%29CC1%29c2cc%28O%29ccc2/file?format=sdf&get3d=True  -- O%3DC%28CC%29C1%28CCN%28C%29CC1%29c2cc%28O%29ccc2 could not be loaded.