Figure 4. After exposure to 5 MED of UVR, about half of the trans-resveratrol (blue) is converted to the cis- isomer (green) and some unidentified photoproducts (purple).

Figures 3, 4 and 5 are the relevant portions of the HPLC chromatograms recorded before irradiation with no EHMC, after 5 MED with no EHMC, and after 5 MED with 4% EHMC, respectively.