Synonyms: 4-Pro-7,9,10-trp-substance P (4-11);4-Prolyl-7,9,10-tryptophan-substance P (4-11);Gpant-1;Pttt-SP(4-11);Substance P (4-11), prolyl(4)-tryptophan(7,9,10)-;L-Methioninamide, L-prolyl-L-glutaminyl-L-glutaminyl-L-tryptophyl-L-phenylalanyl-L-tryptophyl-L-tryptophyl-;