[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a straight-chain saturated fatty acid anion that is the conjugate base of melissic acid, arising from deprotonation of the carboxylic acid group. It is a straight-chain saturated fatty acid anion, a fatty acid anion 30:0 and an ultra-long-chain fatty acid anion. It is a conjugate base of a triacontanoic acid."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1]"}]