BiomarkerOf creatinine A lactam obtained by formal cyclocondensation of creatine. It is a metabolite of creatine. C00791 | D03600 13325157 | 568 HMDB00562 InChI=1S/C4H7N3O/c1-7-2-3(8)6-4(7)5/h2H2,1H3,(H2,5,6,8) CHEBI:16737 DDRJAANPRJIHGJ-UHFFFAOYSA-N FOBI:030708 588 Lean meat Red meat Alpha amino acids and derivatives