[{"from": "human", "value": "Provide a brief overview of this molecule. [C][O][C][=Branch1][C][=O][C][C@H1][C][=C][C][=Branch2][Branch1][=Branch1][=C][Branch2][Ring2][P][C][=C][Ring1][=Branch1][O][C][=C][Ring1][#Branch2][C][=C][Branch2][Ring1][O][C][C@H1][Branch2][Ring1][Branch1][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][=C][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][O][O][C][=Branch1][Branch1][=C][Ring2][Ring1][Ring1][O][O][O]"}, {"from": "gpt", "value": "The molecule is an organic heterotetracyclic compound that is 3,4-dihydro-2H,12H-pyrano[2,3-a]xanthene substituted by a 3,4-dihydroxyphenyl group at position 2, hydroxy groups at positions 3, 5, 9 and 10 and a 2-methoxy-2-oxoethyl group at position 12 (the 2R,3R,12S stereoisomer). It is isolated from the barks of Trichilia catigua and exhibits antioxidant activity. It has a role as an antioxidant and a plant metabolite. It is an extended flavonoid, an organic heterotetracyclic compound, a polyphenol, a methyl ester and a member of catechols."}]