pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
14.0	IUPAC digitized pKa	1	0	CNc1nc(=[NH2+])ccn1C,C[NH2+]c1nc(=N)ccn1C,CNc1[nH+]c(=N)ccn1C	CNc1nc(=N)ccn1C	mol4157	CNc1nc(=N)ccn1C