[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an (omega-1)-hydroxy fatty acid ascaroside obtained by formal condensation of the alcoholic hydroxy group of (17R)-17-hydroxystearic acid with ascarylopyranose (the alpha anomer). It is a metabolite of the nematode Caenorhabditis elegans. It has a role as a Caenorhabditis elegans metabolite. It is a monocarboxylic acid and an (omega-1)-hydroxy fatty acid ascaroside. It is functionally related to a (R)-17-hydroxyoctadecanoic acid. It is a conjugate acid of an ascr#32(1-)."}, {"from": "gpt", "value": "[C][C@H1][C@@H1][Branch2][Ring2][=Branch1][C][C@H1][Branch2][Ring1][S][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C@H1][Branch1][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O][O][O]"}]