[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is the R stereoisomer of (E)-4-hydroxynon-2-enal. It is an enantiomer of a (2E,4S)-4-hydroxynon-2-enal."}, {"from": "gpt", "value": "[C][C][C][C][C][C@H1][Branch1][Branch1][/C][=C][/C][=O][O]"}]