Sesquiterpene esters from Tripterygium wilfordii

A New Dihydroagarofuranoid Sesquiterpene from Microtropis fokienensis with Antituberculosis Activity

“…, and HÀC(9) (d(H) 5.70 (s)), were in agreement with the relative configuration determined for these positions in other members of this class of natural products [9] [10]. Table 2.…”

“…The current phytochemical investigation of the stems of this plant has led to the isolation of a new b-dihydroagarofuranoid sesquiterpene, 8-acetoxymutangin (1), along with eight known compounds, including mutangin (2), vanillin (3), 4-hydroxybenzaldehyde (4), syringic acid (5), 2,6-dimethoxy-1,4-benzoquinone (6), bsitosterol (7), and a mixture of tetracosan-1-ol (8) and hexacosan-1-ol (9). The structural elucidation of 1 and the antituberculosis properties of the isolated compounds are described herein.…”

A New Dihydroagarofuranoid Sesquiterpene and Antituberculosis Constituents from the Root of Microtropis japonica

“…, were in agreement with the relative configuration determined for these positions in other members of this class of natural products [9] [10]. The locations of the ester groups were determined by the HMBC spectrum, in which cross-peaks were observed between an AcO C¼O group (d(C) 169.4), and both HÀC (1) Table 1.…”

“…The phytochemical investigation of the roots of this plant has led to the isolation of a new b-dihydroagarofuranoid sesquiterpene, 15-acetoxyorbiculin A (1), along with 13 known compounds, including six b-dihydroagarofuranoid sesquiterpenes, i.e., fokienagarofuran A (2), fokienagarofuran D (3), ejap-2 (4), mutangin (5), celahin C (6), and salasol A (7), two triterpenoids, i.e., squalene (8) and lupeol (9), two steroids, i.e., bsitosterol (10) and b-sitostenone (11), two benzenoids, i.e., vanillic acid (12) and syringic acid (13), and a lignan, i.e., (À)-syringaresinol (14). The structure elucidation of 1 and the antituberculosis properties of the isolated compounds are described herein.…”

Isolation and Characterization of Sesquiterpenes from Celastrus orbiculatus and Their Antifungal Activities against Phytopathogenic Fungi

“…The known compound was identified by comparison of spectroscopic data with those reported in the literature as 6α-acetoxy-1β,2β,9β-tribenzoyloxy-8β-nicotinoyloxy-β-dihydroagarofuran, 10. 18 Compound 1 was isolated as a white powder. Its molecular formula was determined as C 35 H 40 O 11 on the basis of HR-ESI-MS spectroscopic data, which were consistent with the NMR data.…”