pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.19	Caine	0	-1	CC1(C)CCC(=O)CC1=O	CC1(C)CCC(=O)[CH-]C1=O	mol2734	CC1(C)CCC(=O)CC1=O