pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.9	Datawarrior	1	0	O=N/C(=[NH+]/O)c1ccccc1	O=N/C(=N/O)c1ccccc1	mol14159	O=N/C(=N/O)c1ccccc1