pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.55	IUPAC digitized pKa	1	0	Nc1[nH+]ccn2cncc12,Nc1nccn2c[nH+]cc12,[NH3+]c1nccn2cncc12	Nc1nccn2cncc12	mol7968	Nc1nccn2cncc12