[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=C][Branch1][P][N][Branch1][=N][C][=Branch1][Ring2][=C][Ring1][Branch1][C][C][=Branch1][C][=O][O][C][C][=Branch1][C][=O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][Cl]"}, {"from": "gpt", "value": "Zomepirac, formerly marketed as Zomax tablets, was associated with fatal and near-fatal anaphylactoid reactions. The manufacturer voluntarily removed Zomax tablets from the Canadian, US, and UK markets in March 1983."}]