L-Tyrosine, glycyl-L-alanylglycyl-L-valylglycyl-L-tyrosylglycyl-L-alanylglycyl-L-valylglycyl- L-tyrosylglycyl-L-alanylglycyl-L-valylglycyl-L-tyrosylglycyl-L-alanylglycyl-L-val ylglycyl-