pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.23	IUPAC digitized pKa	1	0	CCC1=NNC(CC)=[NH+]N1	CCC1=NNC(CC)=NN1	mol4293	CCC1=NNC(CC)=NN1