pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.62	IUPAC digitized pKa	0	-1	Cn1c(O)cccc1=O	Cn1c([O-])cccc1=O	mol6445	Cn1c(O)cccc1=O