Structure characterization and possible biogenesis of three new families of nortriterpenoids: schisanartane, schiartane, and 18-norschiartane.
Four new, highly oxygenated nortriterpenoids with unique schisanartane skeletons, micrandilactones D-G (1-4), have been isolated from the leaves and stems of Schisandra micrantha, and their structures have been elucidated on the basis of extensive spectral studies. The postulated biogenetic sequences of sixteen highly oxygenated nortriterpenoids and bisnortriterpenoids with new skeletons from three Schisandra species are discussed and have been compared from a chemotaxonomic standpoint.
Li
Rong-Tao
RT
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, P.R. China.
Xiao
Wei-Lie
WL
Shen
Yun-Heng
YH
Zhao
Qin-Shi
QS
Sun
Han-Dong
HD
D007783:Lactones / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D032141:Schisandra / Q000737:chemistry / Q000378:metabolism; D014315:Triterpenes / Q000737:chemistry* / Q000145:classification / Q000378:metabolism*
C512129:18-norschiartane; D007783:Lactones; D014315:Triterpenes; C512130:schiartane; C512131:schisanartane