2-Ala-5-valnh2-enkephalin 78873-50-4 Anv-enkephalinamide Enkephalin, ala(2)-valnh2(5)- Enkephalin, alanyl(2)-valinamide(5)- L-Tyrosyl-D-alanylglycyl-L-phenylalanyl-L-valinamide L-Valinamide, L-tyrosyl-D-alanylglycyl-L-phenylalanyl-