132930-82-6 2-Ala-6-ser-leu-enkephalin DALES Enkephalin-leu, ala(2)-ser(6)- Enkephalin-leucine, alanyl(2)-serine(6)- L-Serine, N-(N-(N-(N-(N-L-tyrosyl-D-alanyl)glycyl)-L-phenylalanyl)-L-leucyl)- Leu-enkephalin, ala(2)-ser(6)-