pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.6	IUPAC digitized pKa	1	0	Cc1[nH+]c2c(c(=O)n(C)c(=O)n2C)n1C	Cc1nc2c(c(=O)n(C)c(=O)n2C)n1C	mol8437	Cc1nc2c(c(=O)n(C)c(=O)n2C)n1C