N-Amidino-3,5-diamino-6-chloropyrazinamide hydrochloride dihydrate17440-83-4100 % similar Amiloride hydrochloride2016-88-892 % similar Amiloride2609-46-384 % similar Guanfacine hydrochloride29110-48-335 % similar Methyl 3,5-diamino-6-chloropyrazine-2-carboxylate1458-01-134 % similar