From the aerial parts of Ipomoea cairica (L.) Sweet (Convolvulaceae) the coumarins umbelliferone and scopoletin, and the dibenzyl-g-butyrolactone lignans arctigenin, matairesinol and trachelogenin, were isolated along with b-sitoterol and fatty acids. The analysis of the RMN 13C spectra of these and other lignoids described in the literature made it possible to revise some chemical shift assignments.
Ipomoea cairica; Convolvulaceae; coumarins; dibenzylbutyrolactone lignans; 13C-NMR data
