can't read?
Allantoin is a chemical compound with formula C4H6N4O3. It is also called 5-ureidohydantoin or glyoxyldiureide. It is a diureide of glyoxylic acid.
A 1660 (OTTO) Allantoin, 99% Cas 97-59-6 - used as a purine metabolite for biochemical research.