[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a C19-gibberellin initially identified in Gibberella fujikuroi and differing from gibberellin A1 by the absence of the OH at C-2 and the presence of a double bond between C-3 and C-3 (gibbane numbering). It has a role as a plant metabolite and a mouse metabolite. It is a lactone, a C19-gibberellin and a gibberellin monocarboxylic acid."}, {"from": "gpt", "value": "[C][C@@][C][=C][C][C@@][Branch2][Ring2][Ring1][C@@H1][Ring1][=Branch1][C@@H1][Branch2][Ring1][#Branch1][C@][C@H1][Ring1][Branch1][C][C][C@][Branch1][Ring2][C][Ring1][=Branch1][Branch1][Branch2][C][=Branch1][C][=C][C][Ring1][=Branch2][O][C][=Branch1][C][=O][O][O][C][Ring2][Ring1][=Branch1][=O]"}]