pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.31	IUPAC digitized pKa	1	0	CCCC(=O)OCC[NH+](C)C	CCCC(=O)OCCN(C)C	mol1463	CCCC(=O)OCCN(C)C
8.3100004	OCHEM	1	0	CCCC(=O)OCC[NH+](C)C	CCCC(=O)OCCN(C)C	mol1463	CCCC(=O)OCCN(C)C