pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.95	IUPAC digitized pKa	-1	-2	[NH3+][C@@H](CSCC(=O)[O-])C(=O)[O-]	N[C@@H](CSCC(=O)[O-])C(=O)[O-]	mol8513	N[C@@H](CSCC(=O)O)C(=O)O