Source : Webster's Revised Unabridged Dictionary (1913)

Oxalantin \Ox`a*lan"tin\, n. [From {Alloxantin}, by
   transposition of letters.] (Chem.)
   A white crystalline nitrogenous substance ({C6H4N4O5})
   obtained by the reduction of parabanic acid; -- called also
   {leucoturic acid}.