(E)-N-(5-(2-Furanyl)-3-oxo-4-pentenyl)-L-phenylalanine butyl ester 159086-03-0 L-Phenylalanine, N-(5-(2-furanyl)-3-oxo-4-pentenyl)-, butyl ester, (E)- N-(3'-Oxo-5'-alpha-furylpent-4-en-1-yl)phenylalanine butyl ester