Synthesis of biologically and pharmacologically active molecules, including amino acids and nucleotides derivatives. Isolation, structure and characterization of bioactive secondary metabolites produced by fungi, plant pathogenic bacteria and plants with potential applications in agriculture (biopestides) and medicine (anticancer). Chemistry of photosensitizing systems and photoprotective molecules of biomedical interest. Development of new synthetic methodologies, mainly photochemical, for the preparation of bioactive compounds such as C-glycosides and lignans.  Synthesis of natural and modified metabolites and pharmacological active molecules. Chemistry of organic compounds in food. Study of the chemical basis of cell damage from oxidative stress and its control with antioxidant and antinitrosating compounds. Isolation and characterization of bioactive molecules from polar bacteria.