pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.26	IUPAC digitized pKa	1	0	COc1scc2c1CCC[NH2+]2	COc1scc2c1CCCN2	mol7958	COc1scc2c1CCCN2