pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.52	IUPAC digitized pKa	1	0	NC(=O)CCCc1c[nH]c[nH+]1	NC(=O)CCCc1c[nH]cn1	mol3905	NC(=O)CCCc1c[nH]cn1