pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
9.0	IUPAC digitized pKa	1	0	CC(=O)OCCC[NH+](C)C	CC(=O)OCCCN(C)C	mol230	CC(=O)OCCCN(C)C