Acetyl angiotensinogen (1-14), porcine is a synthetic peptide and N-terminal acetylated form of Angiotensinogen (1-14) porcine .

8-hydroxyguanosine (8-OHG) is a marker for measuring the rate of oxidative damage to nucleic acids and lipids.The concentration of 8-OHG in CSF in Parkinson's disease (PD) patients is approximately three-fold that in controls. The concentration of 8-OHG in CSF decreased significantly with the duration of disease. However, the concentration of 8-OHG in serum was not significantly altered in PD patients compared to that in controls.

Tryptophan is one of the 20 standard amino acids. The D-stereoisomer is occasionally found in naturally produced peptides.