pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.8	IUPAC digitized pKa	0	-1	S=c1nn[nH]n1-c1ccccc1	S=c1nn[n-]n1-c1ccccc1	mol10132	S=c1nn[nH]n1-c1ccccc1