Bradykinin

NC (CCCN=C (N) N) C (=O) N1CCCC1C (=O) N2CCCC2C (=O) NCC (=O) NC (CC3=CC=CC=C3) C (=O) NC (CO) C (=O) N4CCCC4C (=O) NC (CC5=CC=CC=C5) C (=O) NC (CCCN=C (N) N) C (O) =O

Bradykinin is a potent vasodilator peptide that exerts its vasodilatory action through stimulation of specific endothelial B2 receptors, thereby causing the release of prostacyclin, NO, and EDHF.