pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.55	IUPAC digitized pKa	0	-1	O=C(O)CC[C@@H]1CCOC1=O	O=C([O-])CC[C@@H]1CCOC1=O	mol9996	O=C(O)CCC1CCOC1=O