The molecule is dizwitterionic form of Ile(5)-angiotensin II (1-7) having both carboxy groups deprotonated and the aspartyl amino group and arginine side-chain protonated. It is a tautomer of an Ile(5)-angiotensin II (1-7).
(2S)-1-[(2S)-2-[[(2S,3S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-azaniumyl-3-carboxylatopropanoyl]amino]-5-(diaminomethylideneazaniumyl)pentanoyl]amino]-3-methylbutanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-3-methylpentanoyl]amino]-3-(1H-imidazol-5-yl)propanoyl]pyrrolidine-2-carboxylate