pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.51	Datawarrior	0	-1	C/C=C\C=C/C(=O)O	C/C=C\C=C/C(=O)[O-]	mol12436	C/C=C\C=C/C(=O)O
4.51000022888184	QSARToolbox	0	-1	C/C=C\C=C/C(=O)O	C/C=C\C=C/C(=O)[O-]	mol12436	C/C=C\C=C/C(=O)O