pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
1.44	IUPAC digitized pKa	1	0	NC(=O)N/[NH+]=C/c1ccco1	NC(=O)N/N=C/c1ccco1	mol8794	NC(=O)N/N=C/c1ccco1