pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.71	IUPAC digitized pKa	1	0	CCCCn1ccc[nH+]c1=O	CCCCn1cccnc1=O	mol7199	CCCCn1cccnc1=O