Amiloride is a member of the class of pyrazines resulting from the formal monoacylation of guanidine with the carboxy group of 3,5-diamino-6-chloropyrazine-2-carboxylic acid. It has a role as a sodium channel blocker and a diuretic. It is a member of pyrazines, an organochlorine compound, an aromatic amine and a member of guanidines. It is a conjugate base of an amiloride(1+).