pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.23	IUPAC digitized pKa	1	0	Nn1cn[nH+]c1,[NH3+]n1cnnc1	Nn1cnnc1	mol7658	Nn1cnnc1