Substance P-related peptide that inhibits binding of G proteins to their receptors. Competitively and reversibly inhibits M2 muscarinic receptor activation of Gi or Go and inhibits Gs activation by β-adrenoceptors.

Neuromedin S (human) is a neuropeptide that contains 33 amino acids. Neuromedin S (human)has been identified in the brain as an endogenous ligand for the orphan G-protein coupled receptor (GPCR) FM-4/TGR-1 and acts on the neuromedin U (NMU) receptor 2 (NMUR2) in the regulation of body weight homeostasis.

Glucodichotomine B (Compound 13) is a natural product which can be isolated from the roots of Chinese medicinal plant Stellaria dichotoma L. var. lanceolata. Glucodichotomine B shows antitumor activity.