The molecule is a peptide cation obtained by deprotonation of the carboxy group and protonation of the amino and guanidino groups of [Hyp(3)]-bradykinin; major species at pH 7.3. It has a role as a bradykinin receptor agonist and a human urinary metabolite. It is a conjugate acid of a [Hyp(3)]-bradykinin.
(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2-[[(2S)-2-[[2-[[(2S,4R)-1-[(2S)-1-[(2S)-2-azaniumyl-5-(diaminomethylideneazaniumyl)pentanoyl]pyrrolidine-2-carbonyl]-4-hydroxypyrrolidine-2-carbonyl]amino]acetyl]amino]-3-phenylpropanoyl]amino]-3-hydroxypropanoyl]pyrrolidine-2-carbonyl]amino]-3-phenylpropanoyl]amino]-5-(diaminomethylideneazaniumyl)pentanoate