91870-20-1 Formyl-(phenylalanyl)(6)-phenylalanine methyl ester Hco-(phe)7-ome L-Phenylalanine, N-(N-(N-(N-(N-(N-(N-formyl-L-phenylalanyl)-D-phenylalanyl)-L-phenylalanyl)-D-phenylalanyl)-L-phenylalanyl)-D-phenylalanyl)-, (Z,E,E,E,E)-