(S)-D-Phenylalanyl-N-(4-((aminoiminomethyl)amino)-1-formylbutyl)-L-prolinamide sulfate (1:1) 83997-16-4 D-Phenylalanyl-L-prolyl-L-arginine aldehyde sulfate (1:1) GYKI 14166 L-Prolinamide, N-(4-((aminoiminomethyl)amino)-1-formylbutyl)-D-phenylalanyl-, sulfate, (S)- RGH-2958