The above results furnish conclusive proof that the two diazo compounds have an asymmetric structure, in part. This is most simply explained by the electronic formulas

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The inner ammonium salt of 2-amino-4-glyoxalinesulfonic acid has been prepared. On boiling with sodium hydroxide, the sodium salt of the acid is obtained.2. 2-Hydroxy-4-glyoxalinesulfonic acid has been prepared.3. 2-Phenyl-4-glyoxalinesulfonic acid has been prepared. Boulder, Colorado

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of the decomposition being the yellow, crystalline compounds dehydrorotenone and rotenonone.3. Similar changes are undergone by dihydrorotenone and isorotenone in pyridine solution, analogous compounds no doubt being formed.4. Dry, crystalline rotenone undergoes no change on long standing.