CANGORINS-F-J, 5 ADDITIONAL OLIGO-NICOTINATED SESQUITERPENE POLYESTERS FROM MAYTENUS ILICIFOLIA

The isolation and structure elucidation of five new oligo-nicotinated sesquiterpene polyesters with a dihydroagarofuran core from Maytenus i licifolia, named cangorins F, G, H, I and J [1-5], is described. The s tructures of these compounds, which possessed nicotinyl, benzoyl, and acetyl groups as esterifying moieties, were elucidated by H-1- and C-1 3-nmr spectroscopic studies, inclusive of heteronuclear correlation, l ong-range correlation, and nOe spectra, along with mass and ed spectra l data, and the X-ray crysrallographic analysis of 1.