4-Pro-7,9,10-trp-11-leunh2-substance P (4-11) 89457-19-2 Ptttl-substance P (4-11) Substance P (4-11), pro(4)-trp(7,9,10)-leunh2(11)- Substance P (4-11), prolyl(4)-tryptophyl(7,9,10)-leucinamide(11)-