pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.24	IUPAC digitized pKa	0	-1	Cc1cc(C(=O)O)nn1C	Cc1cc(C(=O)[O-])nn1C	mol9750	Cc1cc(C(=O)O)nn1C