[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is an acetylenic fatty acid anion and the conjugate base of propynoic acid, arising from deprotonation of the carboxylic acid group. It is a monocarboxylic acid anion, an acetylenic fatty acid anion and a short-chain fatty acid anion. It is a conjugate base of a propynoic acid."}, {"from": "gpt", "value": "[C][#C][C][=Branch1][C][=O][O-1]"}]