SUPPORTING INFORMATION Nuclear Magnetic Resonance Spectroscopic Characterization of Legume Exudates Joseph B. Lambert, *,† Eric A. Heckenback, † Anna E. Hurtley, † Yuyang Wu, † and Jorge A. Santiago-Blay ‡ Department of Chemistry, Northwestern University, Department of Chemistry, Evanston, Illinois 60208-3113, and Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, P. O. Box 37012, Washington, DC 20013-7012, and Department of Biology, Gallaudet University, 800 Florida Avenue NE, Washington, DC 20002