pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
0.45	IUPAC digitized pKa	1	0	CCn1ccc(O)[nH+]c1=O	CCn1ccc(O)nc1=O	mol7440	CCn1ccc(O)nc1=O