[{"from": "human", "value": "Please give me some details about this molecule. [C][/C][=C][Branch1][C][\\C][/C][=Branch1][C][=O][O][C@@H1][C][C][N][C@@H1][Ring1][Branch1][C][=Branch1][Branch1][=C][C][Ring1][Branch1][C][O][C][=Branch1][C][=O][C@@][Branch1][=Branch1][C@H1][Branch1][C][C][O][Branch1][=Branch1][C][Branch1][C][C][C][O]"}, {"from": "gpt", "value": "The molecule is a but-2-enoate ester obtained by formal condensation of the carboxy group of (2E)-2-methylbut-2-enoic acid with the 1-hydroxy group of (1R,7aR)-7-({[(2S,3S)-2,3-dihydroxy-2-isopropylbutanoyl]oxy}methyl)-2,3,5,7a-tetrahydro-1H-pyrrolizin-1-ol. It is a but-2-enoate ester and a member of pyrrolizines."}]