[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a hydroxy fatty aldehyde that is hexadecanal in which one of the hydrogens at position 2 has been replaced by a hydroxy group. It has a role as a Saccharomyces cerevisiae metabolite. It is a hydroxy fatty aldehyde and a long-chain fatty aldehyde. It is functionally related to a hexadecanal."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][Branch1][Ring1][C][=O][O]"}]