pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
0.67	IUPAC digitized pKa	1	0	CCn1cc(C)c(O)[nH+]c1=O	CCn1cc(C)c(O)nc1=O	mol7439	CCn1cc(C)c(O)nc1=O