pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
1.2	IUPAC digitized pKa	2	1	NC1=[NH+]N(c2ccccc2)C(=[OH+])C1	NC1=[NH+]N(c2ccccc2)C(=O)C1	mol4005	NC1=NN(c2ccccc2)C(=O)C1