127493-01-0 9-Pro-(spiro-gamma-lactam)-10-leu-11-trp substance P GR 71251 GR-71,251 Substance P, 9-deglycine-10-((5S)-6-oxo-L-alpha-(2-methylpropyl)-1,7-diazaspiro(4.4)nonane-7-acetic acid)-11-L-tryptophanamide- Substance P, 9-deglycine-10-((5S)-L-alpha-(2-methylpropyl)-6-oxo-1,7-diazaspiro(4.4)nonane-7-acetic acid)-11-L-tryptophanamide- Substance P, pro(9)-(spiro-gamma-lactam)-leu(10)-trp(11)- Substance P, prolyl(9)-(spiro-gamma-lactam)-leucyl(10)-tryptophan(11)-