4-Hydroxyphenyl-Me-2-Me-5-oxo-1-imidazolid-Ac-gly-phe-leu 76157-62-5 Enkephalin-leu, acetaldehyde- L-Leucine, N-(N-(N-((4-((4-hydroxyphenyl)methyl)-2-methyl-5-oxo-1-imidazolidinyl)acetyl)glycyl)-L-phenylalanyl)- Leu-enkephalin, acetaldehyde- Leucine enkephalin, acetaldehyde- N-(N-(N-((4-((4-Hydroxyphenyl)methyl)-2-methyl-5-oxo-1-imidazolid-inyl)acetyl)glycyl)-phenylalanyl)-leucine