An arginine salt of 3- (5-amino-2- (2-methyl-4- (2- (2- (2-phosphonoethoxy) ethoxy) ethoxy) phenethyl) benzo (f) [1,7] naphthyridine- 8-yl) propanoic.Una sal de arginina del ácido 3-(5-amino-2-(2-metil-4-(2-(2-(2-fosfonoetoxi)etoxi)etoxi) fenetil) benzo(f)[1,7]naftiridin-8-il)propanoico.