pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.78	IUPAC digitized pKa	0	-1	O=C(c1ccccc1)C1C(=O)c2ccccc2C1=O	O=C(c1ccccc1)[C-]1C(=O)c2ccccc2C1=O	mol2694	O=C(c1ccccc1)C1C(=O)c2ccccc2C1=O
2.46	Caine	0	-1	O=C(c1ccccc1)C1C(=O)c2ccccc2C1=O	O=C(c1ccccc1)[C-]1C(=O)c2ccccc2C1=O	mol2694	O=C(c1ccccc1)C1C(=O)c2ccccc2C1=O