4-Pro-8-val-7,9,10-trp-substance P (4-11) 4-Prolyl-8-valyl-7,9,10-tryptophan-substance P (4-11) 86917-56-8 Pvt-SP(4-11) Substance P (4-11), pro(4)-val(8)-trp(7,9,10)- Substance P (4-11), prolyl(4)-valyl(8)-tryptophan(7,9,10)-