pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.97	IUPAC digitized pKa	0	-1	O=c1c(Cl)c[nH]c(Cl)c1Cl	O=c1c(Cl)c[n-]c(Cl)c1Cl	mol6592	O=c1c(Cl)c[nH]c(Cl)c1Cl