1-Tyr-psi-(methyleneoxy)-2-gly-5-leu-enkephalinamide 133851-90-8 Enkephalinamide, tyr(1)-psi-(methyleneoxy)-gly(2)-leu(5)- Enkephalinamide, tyrosyl(1)-psi-(methylenoxy)-glycyl(2)-leucine(5)- L-Leucinamide, N-((2-amino-3-(4-hydroxyphenyl)propoxy)acetyl)glycyl-L-phenylalanyl-, (S)- Tyr-(CH2O)-gly-leu-EK