Finally, Figure reports the simulated absorption spectrum of the oxazolidinone photoproduct in water. Sutherland and coworkers characterized oxazolidinone as a major photoproduct of -Cyd. This photoproduct is predicted to absorb below 200 nm, which is below the detection cutoff of the photodiode array detector of the HPLC used in this study. Its absorption spectrum is provided here for completeness.