[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a pyrrolizidine alkaloid found in a variety of plants in the genera Senecio and Crotalaria, and the family Boraginaceae. It is the most common central core for other pyrrolizidine alkaloids."}, {"from": "gpt", "value": "[C][C][N][C][C][=C][Branch1][Branch2][C@@H1][Ring1][Branch1][C@@H1][Ring1][Branch2][O][C][O]"}]