pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.72	IUPAC digitized pKa	0	-1	CC(=O)OCC(=O)C=NO	CC(=O)OCC(=O)C=N[O-]	mol9776	CC(=O)OCC(=O)C=NO