pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
0.91	IUPAC digitized pKa	0	-1	O=C(S)C(=O)S	O=C([S-])C(=O)S	mol8939	O=C(S)C(=O)S
2.71	IUPAC digitized pKa	-1	-2	O=C([S-])C(=O)S	O=C([S-])C(=O)[S-]	mol8939	O=C(S)C(=O)S