英文别名
                        1,2,4,9-tetrahydrospiro[3H-carbazole-3,4'-imidazolidine]-2',5'-dione;1,2,3,4-Tetahydrocarbazol-3-spiro-5'-hydantoin;1,2,4,9-Tetrahydrospiro[3H-carbazole-3,4a(2)-imidazolidine]-2a(2),5a(2)-dione;spiro[1,2,4,9-tetrahydrocarbazole-3,5'-imidazolidine]-2',4'-dione