64309-42-8 Boc-vgan L-Argininamide, N-((1,1-dimethylethoxy)carbonyl)-L-valylglycyl-N-2-naphthalenyl- t-Boc-val-gly-arg-beta-naphthylamide tert-Butyloxycarbonyl-valyl-glycyl-arginine-2-naphthylamide