110044-82-1 Ac-Leu-leu-nle-al Acetylleucyl-leucyl-norleucinal Allnal Cpi(1) L-Leucinamide, N-acetyl-L-leucyl-N-(1-formylpentyl)-, (S)- N-Ac-Leu-leu-norleucinal N-Acetyl-L-leucyl-N-((1S)-1-formylpentyl)-L-leucinamide N-Acetyl-leucyl-leucyl-norleucinal