pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.39	Datawarrior	0	-1	O=C(O)c1cnoc1	O=C([O-])c1cnoc1	mol12423	O=C(O)c1cnoc1
3.3900001	OCHEM	0	-1	O=C(O)c1cnoc1	O=C([O-])c1cnoc1	mol12423	O=C(O)c1cnoc1