[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a pro-drug with its 6-methoxy-2-naphthylacetic acid (6-MNA) metabolite acting as a potent COX inhibitor similar in structure to [naproxen]. Nabumetone was developed by Smithkline Beecham under the trade name Relafen and first received FDA approval in December, 1991."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][C][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=C][Branch1][Branch1][C][=C][Ring1][Branch2][O][C]"}]