2-Ala-4-didehydro-phe-met-enkephalinamide 69181-23-3 Enk-madhp Enkephalinamide-met, ala(2)-didehydro-phe(4)- Enkephalinamide-met, alanyl(2)-didehydrophenylalanine(4)- L-Methioninamide, L-tyrosyl-D-alanylglycyl-(Z)-alpha,beta-didehydrophenylalanyl- Met-enkephalinamide, ala(2)-didehydro-phe(4)- Methionine-enkephalinamide, ala(2)-didehydro-phe(4)-