Characterization of an Anti-tuberculosis Resin Glycoside from the Prairie Medicinal Plant Ipomoea leptophylla
Journal of Natural Products
The organic soluble extract from the leaves of the native North American prairie plant Ipomoea leptophylla (big root morning glory) showed in vitro activity against M. tuberculosis. Bioassay-guided fractionation of this extract resulted in the identification of two new resin glycosides (6, 7). Base-catalyzed hydrolysis of these glycosides gave operculinic acid (1) as the glycosidic acid component as well as trans-cinnamic acid, propanoic acid, and lauric acid. The complete structure elucidation was accomplished through derivatization, 1D and 2D NMR spectroscopy (TOCSY, ROESY, HSQC, HMBC), and MS/ MS experiments on 6 and 7 as well as the permethylated derivative 8.
Original Publication Date
DOI of published version
Barnes, Curtis C.; Smalley, Mary K.; Manfredi, Kirk P.; Kindscher, Kelly; Loring, Hillary; and Sheeley, Douglas M., "Characterization of an Anti-tuberculosis Resin Glycoside from the Prairie Medicinal Plant Ipomoea leptophylla" (2003). Faculty Publications. 3315.