4-Pro-7,9-trp-substance P (4-11) 4-Prolyl-7,9-trytophan-substance P (4-11) 81039-85-2 L-Methioninamide, D-prolyl-L-glutaminyl-L-glutaminyl-D-tryptophyl-L-phenylalanyl-D-tryptophyl-L-leucyl- Ptt-SP(4-11) Substance P (4-11), pro(4)-trp(7,9)- Substance P (4-11), prolyl(4)-tryptophan(7,9)-