pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.47	IUPAC digitized pKa	2	1	""	N#[N+]c1ccc(O)cc1	mol9933	N#[N+]c1ccc(O)cc1
3.4	IUPAC digitized pKa	2	1	""	N#[N+]c1ccc(O)cc1	mol9933	N#[N+]c1ccc(O)cc1