substance P-(5-11);Substance P (5-11);(2S)-2-amino-N-[(2S)-5-amino-1-[[(2S)-1-[[(2S)-1-[[2-[[(2S)-1-[[(2S)-1-amino-4-methylsulfanyl-1-oxobutan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-2-oxoethyl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-1,5-dioxopentan-2-yl]pentanediamide
6-dimethylbenzenesulphonyl (Mds) group for the protectiono of the guanidinofunction, which is readily removed with trifluoroacetic acid–thioanisole but is resistant to hydrogenolysis or treatment with dilute hydrogen chloride, can be used in the solution synthesis of arginine-containing peptides; this protectinggroup was effectively used in the synthesis of substance P and two LH–RH analogues.