pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.01	IUPAC digitized pKa	1	0	c1[nH+][nH]c2c1CCCC2	c1n[nH]c2c1CCCC2	mol7818	c1n[nH]c2c1CCCC2