ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1CCC2%3DC%28C1%29C3%3DC4N2C5%3DCC%3DCC%3DC5CSC4%3DCC%3DC3/file?format=sdf&get3d=True  -- CN1CCC2%3DC%28C1%29C3%3DC4N2C5%3DCC%3DCC%3DC5CSC4%3DCC%3DC3 could not be loaded.