pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.7	IUPAC digitized pKa	0	-1	C/C=C/C(=O)O	C/C=C/C(=O)[O-]	mol1748	C/C=C/C(=O)O
4.74	IUPAC digitized pKa	0	-1	C/C=C/C(=O)O	C/C=C/C(=O)[O-]	mol1748	C/C=C/C(=O)O
4.79	Datawarrior	0	-1	C/C=C/C(=O)O	C/C=C/C(=O)[O-]	mol1748	C/C=C/C(=O)O
4.44	OCHEM	0	-1	C/C=C/C(=O)O	C/C=C/C(=O)[O-]	mol1748	C/C=C/C(=O)O