pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.9	IUPAC digitized pKa	1	0	C[NH+]1CC(=O)c2ccccc2C1	CN1CC(=O)c2ccccc2C1	mol4344	CN1CC(=O)c2ccccc2C1