pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.31	IUPAC digitized pKa	0	-1	Cc1cc(C(=O)O)n(C)n1	Cc1cc(C(=O)[O-])n(C)n1	mol9751	Cc1cc(C(=O)O)n(C)n1