1 NMR Structure Elucidation of Small Organic Molecules and Natural Products: Choosing ADEQUATE vs. HMBC Alexei V. Buevich,* ,† R. Thomas Williamson, ‡ and Gary E. Martin ‡ † Merck Research Laboratories, Discovery and Preclinical Sciences, Process and Analytical Chemistry, NMR Structure Elucidation, Kenilworth, NJ 07033, United States ‡ Merck Research Laboratories, Discovery and Preclinical Sciences, Process and Analytical Chemistry, NMR Structure Elucidation, Rahway, NJ 07065, United States