2-Ala-5-val-enkephalin 78859-44-6 Anv-enkephalin Enkephalin, ala(2)-val(5)- Enkephalin, alanyl(2)-valine(5)- L-Valine, N-(N-(N-(N-L-tyrosyl-D-alanyl)glycyl)-L-phenylalanyl)- N-(N-(N-(N-L-Tyrosyl-D-alanyl)glycyl)-L-phenylalanyl)-L-valine