pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
0.24	IUPAC digitized pKa	0	-1	Cc1c(O)c(=O)c1=O	Cc1c([O-])c(=O)c1=O	mol9300	Cc1c(O)c(=O)c1=O