Products of Photochemical Degradtion of Tryptophan

In previous papers, the authors described on the photolysis of tryptophan and its resulting products. Afterwards, further experiments were attempted to confirm those products when oxidizable L- and DL-tryptophan were treated with peracetic acid and performic acid. Among the oxidized products of L-tryptophan, L-kynurenine was isolated and identified as L-kynurenine sulfate monohydrate, and DL-kynurenine sulfate monohydrate was similary derived from DL-tryptophan. Now L- and DL-kynurenine may be prepared easily by the use of peracetic acid without depending upon the biological method.