pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.34	IUPAC digitized pKa	0	-1	[NH3+]CC#CC(=O)[O-]	NCC#CC(=O)[O-]	mol8473	NCC#CC(=O)O
1.8	IUPAC digitized pKa	1	0	[NH3+]CC#CC(=O)O	[NH3+]CC#CC(=O)[O-]	mol8473	NCC#CC(=O)O