pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.72	IUPAC digitized pKa	0	-1	CCOC(=O)C(=O)[C@H](OCC)C(=O)OCC	CCOC(=O)C(=O)[C-](OCC)C(=O)OCC	mol11260	CCOC(=O)C(=O)C(OCC)C(=O)OCC