pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.89	IUPAC digitized pKa	0	-1	CCOC(=O)C(=O)[C@H](CC)C(=O)OCC	CCOC(=O)C(=O)[C-](CC)C(=O)OCC	mol11259	CCOC(=O)C(=O)C(CC)C(=O)OCC