67608-06-4 Bz-Ile-glu(gamma-piperidyl)-gly-arg-pna L-Argininamide, N-benzoyl-L-isoleucyl-5-oxo-5-(1-piperidinyl)-L-norvalylglycyl-N-(4-nitrophenyl)- L-Argininamide, N-benzoyl-L-isoleucyl-5-oxo-5-(1-piperidinyloxy)-L-norvalylglycyl-N-(4-nitrophenyl)- S 2337 S-2337