Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA.|Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA.|Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA.|Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA.|Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA.|Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA.|Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA.|Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA.|Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA.|Department of Physics, University of California San Diego, La Jolla, CA 92093, USA.|Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA.|Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, USA, Departments of Genetics and Medicine, Washington University School of Medicine, St. Louis, MO 63130, USA.|Pfizer Worldwide Research and Development, San Diego, CA 92121, USA and.|Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA.|Scripps Center for Metabolomics, The Scripps Research Institute, La Jolla, CA 92037, USA, Departments of Chemistry, Molecular and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.