[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][/C][=Branch1][=C][=C][\\C][=C][\\C][=Branch1][#Branch1][=C][\\C][=Branch1][C][=O][O-1][\\C][/C][=C][/C][=C][Branch1][=C][C][=Branch1][C][=O][C][C][C][Ring1][#Branch1][Branch1][C][C][C][C][O]"}, {"from": "gpt", "value": "The molecule is a retinoid anion that is the conjugate base of all-trans-4-oxo-18-hydroxyretinoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a retinoid anion, an oxo monocarboxylic acid anion and a hydroxy monocarboxylic acid anion. It is a conjugate base of an all-trans-4-oxo-18-hydroxyretinoic acid."}]