Figure 3. Deduced pathways of dehydroascorbic acid and diketogulonate degradation in the presence of H₂O₂, superoxide, or singlet oxygen.

The two substrates tested are in boxes. Black, red, and blue arrows show the H₂O₂, superoxide, and singlet oxygen pathways, respectively. Arrow thickness indicates the prevalence of reaction. ‘H₂O’ indicates a hydrolysis reaction; ‘[O]’ indicates an oxidation reaction (caused by ROS). [cOxTL] is a hypothetical highly reactive intermediate. For abbreviations, see Figure 1.