pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.5	Organic Oxygen Acids and Nitrogen Bases	0	-1	O=CN(O)CC(=O)O	O=CN(O)CC(=O)[O-]	mol21759	O=CN(O)CC(=O)O