2-Ala-4-Me-phe-leu-enkephalin 64963-13-9 DAMLE Enkephalin-leu, ala(2)-Me-phe(4)- Enkephalin-leu, alanine(2)-Me-phe(4)- L-Leucine, N-(N-(N-methyl-N-(N-L-tyrosyl-D-alanyl)glycyl)-L-phenylalanyl)-, (3S-(3alpha,4abeta,5beta,6beta,6aalpha,10alpha,10abeta,10balpha))- Leu-enkephalin, ala(2)-Me-phe(4)- Leucine-enkephalin, ala(2)-Me-phe(4)-