The chemical [Nle11]-Substance P has a designated molecular formula of C64H100N18O13 and a molecular weight of 1329.617 g/mol. Synonyms may include: Substance P, nlenh2(11)-, 11-Nlenh2-SP, 11-Nlenh2-substance P, Substance P, norleucinamide(11)- (ChemID).