pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.09	IUPAC digitized pKa	1	0	CCC[NH2+]c1ncccn1,CCCNc1nccc[nH+]1	CCCNc1ncccn1	mol2458	CCCNc1ncccn1