[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=C][C][=Branch2][Ring1][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][=Branch2][=C][C][=Branch1][C][=O][O][Ring1][#Branch1][O-1][O]"}, {"from": "gpt", "value": "The molecule is an organic anion that is the conjugate base of 4,7-dihydroxy-5-methylcoumarin, obtained by deprotonation of the 4-hydroxy group. It is the major microspecies at pH 7.3. It is a conjugate base of a 4,7-dihydroxy-5-methylcoumarin."}]