[{"from": "human", "value": "What can you tell me about this molecule? [C][S][=Branch1][C][=O][=Branch1][C][=O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=C][Branch1][=Branch2][C][=Branch1][C][=O][O][C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a butenolide that is furan-2(5H)-one substituted by a phenyl group at position 3 and by a p-(methylsulfonyl)phenyl group at position 4. A selective cyclooxygenase 2 inhibitor, it was used from 1999 to 2004 for the treatment of ostoarthritis, but was withdrawn following concerns about an associated increased risk of heart attack and stroke. It has a role as a cyclooxygenase 2 inhibitor, a non-steroidal anti-inflammatory drug and an analgesic. It is a sulfone and a butenolide."}]