pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
13.2	IUPAC digitized pKa	0	-1	CCCC[C@H](C(C)=O)C(=O)OCC	CCCC[C-](C(C)=O)C(=O)OCC	mol11265	CCCCC(C(C)=O)C(=O)OCC