pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.2	IUPAC digitized pKa	1	0	C1=[NH+]NC2(C1)CCC2,C1=N[NH2+]C2(C1)CCC2	C1=NNC2(C1)CCC2	mol6873	C1=NNC2(C1)CCC2