4-(4'-Bromo-phe)-leu-enkephalin 89705-56-6 Enkephalin-leu, 4'-bromo-phe(4)- Enkephalin-leu, 4'-bromophenylalanine(4)- L-Leucine, N-(4-bromo-N-(N-(N-L-tyrosylglycyl)glycyl)-L-phenylalanyl)- LEBP Leu-enkephalin, 4'-bromo-phe(4)- Leucine-enkephalin, 4'-bromo-phe(4)-