Diazosalicylic acid

5-diazosalicylic acid

6-Oxo-3-diazo-1,4-cyclohexadiene-1-carboxylic acid

5-Diazo-2,5-dihydro-2-oxo-1-benzenecarboxylic acid

3-Diazo-6-oxo-1,4-cyclohexadiene-1-carboxylic acid