[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][C][C][C][C@H1][Branch1][Branch1][/C][=C][/C][=O][O]"}, {"from": "gpt", "value": "The molecule is the R stereoisomer of (E)-4-hydroxynon-2-enal. It is an enantiomer of a (2E,4S)-4-hydroxynon-2-enal."}]