allantoin(redirected from 3-ureidohydantoin)
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A substance present in allantoic fluid, fetal urine, and elsewhere; also an oxidation product of uric acid and the end product of purine metabolism in animals other than humans and the other primates.
An oxidation product of uric acid, C4H6N4O3, found in the urine of most mammals (except humans and related primates) as the metabolic end product of purine oxidation, and also found in some plants. It is also produced synthetically and is often used in cosmetics and pharmaceuticals.