L-Alanine, L-phenylalanyl-L-phenylalanyl-L-tyrosyl-L-isoleucyl-L-leucyl-L-phenylalanyl- L-leucyl-L-phenylalanyl-L-isoleucyl-L-tyrosyl-L-prolyl-L-isoleucyl-L-threonyl-L -leucyl-L-isoleucylglycyl-L-a