pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.05	IUPAC digitized pKa	0	-1	COc1ccc(-c2c(O)c(=O)c2=O)cc1	COc1ccc(-c2c([O-])c(=O)c2=O)cc1	mol11492	COc1ccc(-c2c(O)c(=O)c2=O)cc1