pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.0	IUPAC digitized pKa	1	0	Cn1[nH+]nc2ncncc21,Cn1nnc2[nH+]cncc21,Cn1nnc2nc[nH+]cc21,Cn1n[nH+]c2ncncc21	Cn1nnc2ncncc21	mol8360	Cn1nnc2ncncc21