4-Hydroxyphenylbutazone-d9

4-Hydroxyphenylbutazone-d9 is the deuterium labeled 4-Hydroxyphenylbutazone (HY-139199). 4-Hydroxyphenylbutazone is a metabolite of Phenylbutazone. Phenylbutazone, a nonsteroidal anti-inflammatory agent (NSAID), is an efficient reducing cofactor for the peroxidase activity of prostaglandin H synthase (PHS).