SMILES: CC1=CC(=CC2=C1C(=CC(=O)O2)[O-])O
Description: 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.