pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.18	IUPAC digitized pKa	0	-1	COc1cc(NC(C)=O)ccc1C(=O)O	COc1cc(NC(C)=O)ccc1C(=O)[O-]	mol11365	COc1cc(NC(C)=O)ccc1C(=O)O