[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C@H1][Branch2][Ring2][C][C@@][Branch1][=Branch1][C][Branch1][C][C][C][Branch2][Ring1][=Branch1][C][=Branch1][C][=O][O][C][C][=C][C][N][C@H1][Ring1][Branch1][C@@H1][Branch1][Branch1][C][C][Ring1][Branch1][O][O][O]"}, {"from": "gpt", "value": "The molecule is a carboxylic ester compound formed from condensation between retronecine and (2S,3R)-2,3-dihydroxy-2-isopropylbutanoic acid. It is a member of pyrrolizines, an azabicycloalkane and a carboxylic ester."}]