                                   Alpha-amino acids and derivatives   Proline    000.0000           0.00                   0.0000   Valine                                   000.0000                            0.00       0.0000                                       Asparagine                               000.0000                            0.00       0.0000                                       Pyroglutamic acid                        000.0000                            0.00       0.0000                                       [N]{.smallcaps}-acetylaspartic acid      000.0000                            0.00       0.0000                                       [N]{.smallcaps}-acyl-alpha-amino acids   [N]{.smallcaps}-acetylvaline        000.0000   0.00               0.0000                    Purine derivatives                       Xanthine                            000.0000   0.00               0.0000                    Purine nucleotides                       Adenosine monophosphate (AMP)       000.0000   0.00               0.0000                    Fatty acid esters                        0-methylbutyrylcarnitine            000.0000   00.00              0.0000                    Ethyl eicosapentaenoic acid              000.0000                            00.00      0.0000                                       Benzoic acids and derivatives            0-aminobenzoic acid                 000.0000   0.00               0.0000                    