pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.72	Datawarrior	0	-1	C/C=C/CCC(=O)O	C/C=C/CCC(=O)[O-]	mol12438	C/C=C/CCC(=O)O