pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.96	IUPAC digitized pKa	0	-1	Cn1nnc2[nH]c(S(C)(=O)=O)nc(=O)c21	Cn1nnc2[n-]c(S(C)(=O)=O)nc(=O)c21	mol9904	Cn1nnc2[nH]c(S(C)(=O)=O)nc(=O)c21