1. These include ammonia, allantoin , uric acid, and urea. 2. For this purpose, it is sometimes combined with allantoin . 3. In 5-hydroxyisourate, which decarboxylates to allantoin and allantoic acid. 4. The use of an anti-irritant like allantoin is also helpful. 5. Such agents ( keratolytics ) include urea, lactic acid, and allantoin . 6. Allantoin , lactic acid, retinol and squalene, for example, can be vegan.7. They secrete allantoin , which is used to treat the infectious bone disease, Osteomyelitis. 8. The systematic name of this enzyme class is "'allantoin racemase " '. 9. It is a recombinant version of urate oxidase, an enzyme that metabolizes uric acid to allantoin . 10. His research included studies of nitrites, allantoin , aromatic glycols and on the synthesis of citric acid.