pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.25	IUPAC digitized pKa	0	-1	O=C1CC[C@@H](C(=O)O)C1	O=C1CC[C@@H](C(=O)[O-])C1	mol9557	O=C1CCC(C(=O)O)C1