The chemical Substance P (5-11) has a known molecular formula of C41-H60-N10-O9-S. Synonyms may include: 1-Dearginyl-2,4-deprolyl-3-delysine-substance P, 1-Des-arg-2,4-des-pro-3-des-lys-substance P, Spcthp, Substance P, dearginyl(1)-deprolyl(2,4)-delysine(3)-, Substance P C-terminal heptapeptide (ChemID).