User: I'm looking for the SMILES of a molecule that can be described as:
The molecule is dizwitterionic form of homocystine arising from transfer of two protons from the carboxy to the amino groups; major species at pH 7.3. It has a role as a human metabolite. It is a tautomer of a homocystine.
Assistant: This is a molecule that fits this description: [NH3+]C(CCSSCCC([NH3+])C(=O)[O-])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(CCSSCCC([NH3+])C(=O)[O-])C(=O)[O-]
2-azaniumyl-4-[(3-azaniumyl-3-carboxylatopropyl)disulfanyl]butanoate
The molecule is dizwitterionic form of homocystine arising from transfer of two protons from the carboxy to the amino groups; major species at pH 7.3. It has a role as a human metabolite. It is a tautomer of a homocystine.