pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.9	OCHEM	0	-1	CCCCCCCCCCCCC(=O)O	CCCCCCCCCCCCC(=O)[O-]	mol18552	CCCCCCCCCCCCC(=O)O