L-Arg-L-Pro-L-Lys-L-Pro-Gln-L-Gln-L-Phe-L-Phe-Gly-L-Leu-L-Met-OMe

L-Arg-L-Pro-L-Lys-L-Pro-L-Glu(NH2)-L-Glu(NH2)-L-Phe-L-Phe-Gly-L-Leu-L-Met-OMe

Arg-Pro-Lys-Pro-Gln-Gln-Phe-Phe-Gly-Leu-Met-OMe, Substance P methyl ester