[{"from": "human", "value": "Generate a molecule based on this description. The molecule is released upon activation of mast cells and is also synthesized by alveolar macrophages. Among its many biological actions, the most important are its bronchoconstrictor, platelet-activating-factor-inhibitory, and cytotoxic effects."}, {"from": "gpt", "value": "[C][C][C][C][C][C@@H1][Branch2][Ring1][O][/C][=C][/C@@H1][C@H1][Branch1][#Branch2][C@H1][Branch1][=Branch1][C][C][Ring1][Branch1][=O][O][C][/C][=C][\\C][C][C][C][=Branch1][C][=O][O][O]"}]