pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.67	IUPAC digitized pKa	1	0	[NH3+]c1nc2ccc3ccccc3c2c2ccccc12,Nc1[nH+]c2ccc3ccccc3c2c2ccccc12	Nc1nc2ccc3ccccc3c2c2ccccc12	mol8423	Nc1nc2ccc3ccccc3c2c2ccccc12