83380-08-9 Enkephalinamide, met-metazocine- L-Methioninamide, N-((3,4,5,6-tetrahydro-8-hydroxy-3,6,11-trimethyl-2,6-methano-3-benzazocin-2(1H)-yl)carbonyl)glycylglycyl-L-phenylalanyl-, (2R-(2alpha,6beta,11R*))- Met-enkephalinamide-metazocine Methionine enkephalinamide-metazocine