pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.43	IUPAC digitized pKa	0	-1	C=CC[NH+](CC(=O)[O-])CC(=O)O	C=CC[NH+](CC(=O)[O-])CC(=O)[O-]	mol10239	C=CCN(CC(=O)O)CC(=O)O
9.28	IUPAC digitized pKa	-1	-2	C=CC[NH+](CC(=O)[O-])CC(=O)[O-]	C=CCN(CC(=O)[O-])CC(=O)[O-]	mol10239	C=CCN(CC(=O)O)CC(=O)O