pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
12.1	IUPAC digitized pKa	-1	-2	O=S(=O)([O-])c1cccc2ccc(O)c(N=Nc3ccc(Cl)cc3)c12	O=S(=O)([O-])c1cccc2ccc([O-])c(N=Nc3ccc(Cl)cc3)c12	mol12138	O=S(=O)(O)c1cccc2ccc(O)c(N=Nc3ccc(Cl)cc3)c12