pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.16	IUPAC digitized pKa	0	-1	O=c1ccc2ns[nH]c-2c1	O=c1ccc2ns[n-]c-2c1	mol9853	O=c1ccc2ns[nH]c-2c1