Photooxidation Products from a Marine Cadinane Sesquiterpenoid2021 · <p>To show that artifacts can readily form during research on marine natural products, a common marine sesquiterpenoid <b>1</b> was treated with sunlight in the presence of a pigment. Another set of solutions were prepared and kept in shade under the bench for two weeks as negative controls. As a result, four oxygenated derivatives <b>2</b>–<b>5</b> were obtained. A unique structure of a highly oxidized molecule <b>5</b> was solved by X-ray crystallography.</p>
