Stereocontrolled Synthesis of the Quinaldic Acid Macrocyclic System of Thiostrepton We thank Drs. D. H. Huang and G. Suizdak for NMR spectroscopic and mass spectrometric assistance, respectively, as well as Mike Sertic (University of California, San Diego) for experimental assistance. Financial support for this work was provided by The Skaggs Institute for Chemical Biology, the National Institutes of Health (USA), fellowships from The Skaggs Institute for Research (to M.Z. and F.Z.), and grants from Abbott, Amgen, Array Biopharma, Boehringer-Ingelheim, Glaxo, Hoffmann-LaRoche, DuPont, Merck, Novartis, Pfizer, and Schering Plough.