Two new norditerpene furan glycosides (cordifoliside D and cordifoliside E) were isolated, as their tetraacetates, from the polar butanol extract of Tinospora cordifolia stems. The structural elucidations and relative configurations are based on high-resolution 1D and 2D NMR spectroscopy.
V. D. Gangan, Pradhan, P., Sipahimalani, A. T., and Banerji, A., “Norditerpene furan glycosides from Tinospora cordifolia”, Phytochemistry, vol. 39, pp. 1139–1142, 1995.