pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
-2.22	IUPAC digitized pKa	1	0	c1ccc2[nH+]occ2c1	c1ccc2nocc2c1	mol7778	c1ccc2nocc2c1