and -2, human cytomegalovirus (HCMV), dengue virus (DENV), respiratory syncytial virus (RSV), and - ?uenza Avirus. InchapternineHamdietal.describesthesynthesisandbiologicalactivities of the heterocyclicand vanillin ether coumarins. In the last chapter, Orhan et al. reviews their recent ?ndings on antiviral and antimicrobial heterocyclic compounds fromTurkish plants. Tromsø, Norway 2007 Mahmud Tareq Hassan Khan Contents FunctionalizationofIndoleandPyrroleCores viaMichael-TypeAdditions N.Saracoglu ................................ 1 ChemistryoftheWelwitindolinones J.C.Menéndez ............................... 63 LignansFrom TaxusSpecies G.Topcu·O.Demirkiran.......................... 103 AntioxidantActivities ofSyntheticIndoleDerivatives andPossibleActivity Mechanisms S.Süzen................................... 145 Quinoxaline 1, 4-DioxideandPhenazine5, 10-Dioxide.