pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.5	IUPAC digitized pKa	0	-1	CC1=NOC(=O)C1=NNc1ccccc1Cl	CC1=NOC(=O)C1=N[N-]c1ccccc1Cl	mol11450	CC1=NOC(=O)C1=NNc1ccccc1Cl