Des-Leu10-angiotensin I is a nonapeptide that inhibits rabbit lung angiotensin-converting enzyme peptidyl-dipeptide hydrolase with a Ki value of 31 μM, which is generated from angiotensin I by the action of carboxypeptidase-like activities residing in the human platelet and mast cell.

1,3,7-Trimethyluric acid is a purine alkaloid that occurs as a minor metabolite of caffeine in humans.?As an antioxidant, it has shown an ability to scavenge hydroxyl radicals as well as protective potential against lipid peroxidation in erythrocyte membranes.

Hirudonucleodisulfide B is a heterocyclic compound that can be found in Whitmania pigra. Hirudonucleodisulfide B shows moderately anti-anoxic activity.