New iridoids from Gelsemium species.
Four new iridoids structurally related to gelsemide (5) were isolated from two Loganiaceous plants, Gelsemium elegans and G. rankinii. Among them, GEIR-1 (1) has a novel tetracyclic caged structure.
Graduate School of Pharmaceutical Sciences, Chiba University, Japan.
Noriyuki
N
Kogure
Naoko
N
Ishii
Hiromi
H
Kobayashi
Mariko
M
Kitajima
Sumphan
S
Wongseripipatana
Hiromitsu
H
Takayama
D018360:Crystallography, X-Ray; D031450:Gelsemium / Q000737:chemistry*; D039823:Iridoids / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D000432:Methanol; D008958:Models, Molecular; D008968:Molecular Conformation; D018515:Plant Leaves / Q000737:chemistry; D012997:Solvents; D016339:Spectrometry, Mass, Fast Atom Bombardment
D039823:Iridoids; D012997:Solvents; D000432:Methanol