pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.5	OCHEM	0	-1	O=Nc1c(O)c(N=O)c2ccccc2c1O	O=Nc1c(O)c(N=O)c2ccccc2c1[O-],O=Nc1c([O-])c(N=O)c2ccccc2c1O	mol11272	O=Nc1c(O)c(N=O)c2ccccc2c1O