pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
11.26	IUPAC digitized pKa	1	0	C1CCN2CCNC2=[NH+]C1	C1CCN2CCNC2=NC1	mol7964	C1CCN2CCNC2=NC1