pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.56	IUPAC digitized pKa	1	0	CCOC(=O)C(C(=O)OCC)[n+]1ccccc1	CCOC(=O)[C-](C(=O)OCC)[n+]1ccccc1	mol11728	CCOC(=O)[C-](C(=O)OCC)[n+]1ccccc1