ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28c1cccc2ccccc12%29c3cn%28CC4CCCCC4%29c5ccccc35/file?format=sdf&get3d=True  -- O%3DC%28c1cccc2ccccc12%29c3cn%28CC4CCCCC4%29c5ccccc35 could not be loaded.