User: I'm looking for the SMILES of a molecule that can be described as:
The molecule is a dipeptide zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of Phe-His. Major species at pH 7.3. It is a tautomer of a member of Phe-His.
Assistant: This is a molecule that fits this description: [NH3+][C@@H](Cc1ccccc1)C(=O)N[C@@H](Cc1cnc[nH]1)C(=O)[O-]
User: I'm {#searching|looking!} for the {SMILES__description} of a molecule that can be described {#by|as!}:
{description#}
Assistant: This is a molecule that fits {#your|this!} description: {SMILES#}
[NH3+][C@@H](Cc1ccccc1)C(=O)N[C@@H](Cc1cnc[nH]1)C(=O)[O-]
(2S)-2-[[(2S)-2-azaniumyl-3-phenylpropanoyl]amino]-3-(1H-imidazol-5-yl)propanoate
The molecule is a dipeptide zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of Phe-His. Major species at pH 7.3. It is a tautomer of a member of Phe-His.