pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.15	IUPAC digitized pKa	1	0	CC1=NNC(C)=[NH+]N1	CC1=NNC(C)=NN1	mol4295	CC1=NNC(C)=NN1