1. Murexide is the product of the complex " in-situ " multistep reaction of alloxantin and gaseous ammonia.
  2. A dimeric derivative "'alloxantin "'can be prepared by partial reduction of alloxan with hydrogen sulfide.
  3. It may be prepared by heating alloxantin in ammonia gas to 100 癈, or by boiling uramil ( 5-aminobarbituric acid ) with mercury oxide.
  4. In this process alloxantin is dissolved in a large excess of boiling absolute alcohol, and dry ammonia gas is passed into the solution for about three hours.


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