70706-82-0 Isovaleryl-L-valyl-L-valylstatyl-L-alanylstatyl-L-arginine methyl ester Pepstatin A, 5a-L-arginine-, methyl ester Pepstatin arginine methyl ester Pepstatinyl arginine methyl ester Pepstatyl-arg-ome Pepstatyl-arginine methyl ester