[{"from": "human", "value": "Provide a brief overview of this molecule. [C][O][C][=C][C][=Branch2][Ring2][#Branch2][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][=C][C][C@H1][Branch1][=N][O][C][=Branch1][C][=O][C][Ring1][#Branch1][=C][Ring1][N][O][C][C@@H1][Branch1][N][C][C@@H1][Branch1][#Branch1][C][C][C][C][C][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a naphthopyran that is 3,4-dihydronaphtho[2,3-c]pyran-1-one which is substituted by a (2R,4R)-2,4,9-trihydroxynonyl group at position 3 and a methoxy group at position 7. Published in Acta Pharm. Sin. B, 2013, 3, 163-166. See also J. Antibiot., 2011, 64, 503-508. It is an aromatic ether, a member of phenols, a delta-lactone, a secondary alcohol, a primary alcohol and a naphtho-alpha-pyrone."}]