69201-89-4 Boc-D-phe-pro-arg-al Gyki 14,451 Gyki 14451 L-Prolinamide, N-((1,1-dimethylethoxy)carbonyl)-D-phenylalanyl-N-(4-((aminoiminomethyl)amino)-1-formylbutyl)-, (S)- LY 178207 tert-Butyl-oxy-carbonyl-D-phe-pro-arg-al tert-Butyloxycarbonyl-phenylalanyl-prolyl-arginal