1H-Tetrazole, 5-guanidino- 5-Guanidino-1H-tetrazole 5-Guanylaminotetrazole 66591-60-4 AIDS-123978 AIDS123978 Guanidine, 1-(1H-tetrazol-5-yl)- Guanidine, 1H-tetrazol-5-yl- N-(1H-Tetraazol-5-yl)guanidine NSC4438