pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.04	IUPAC digitized pKa	0	-1	CCCC[C@H](C)C(=O)O	CCCC[C@H](C)C(=O)[O-]	mol10023	CCCCC(C)C(=O)O