pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.99	IUPAC digitized pKa	1	0	CC(=O)NCCc1c[nH]c[nH+]1	CC(=O)NCCc1c[nH]cn1	mol6627	CC(=O)NCCc1c[nH]cn1