ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc1cc%28C%5CN%3DC%28/O%29%5CCCCCCCCC%28C%29C%29ccc1O/file?format=sdf&get3d=True  -- COc1cc%28C%5CN%3DC%28/O%29%5CCCCCCCCC%28C%29C%29ccc1O could not be loaded.