Iridoids from Phlomis umbrosa.
Two epimeric pairs of iridoid aglycones, named shanzhigenin methyl ester and 1-epishanzhigenin methyl ester, and 8-acetylshanzhigenin methyl ester and 8-acetyl-1-epishanzhigenin methyl ester, were isolated from Phlomis umbrosa roots, along with five known iridoid glucosides. The four iridoid aglycones are reported for the first time from a natural source. Their structures were established by spectroscopic methods, mainly 1D- and 2D-NMR spectroscopic experiments, and chemical methods.
Department of Chemistry, National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, P.R. China.
S J
SJ
Guo
L M
LM
Gao
D L
DL
Cheng
D000107:Acetylation; D005960:Glucosides / Q000737:chemistry* / Q000302:isolation & purification; D039823:Iridoids; D009682:Magnetic Resonance Spectroscopy; D010936:Plant Extracts / Q000032:analysis; D010946:Plants, Medicinal / Q000737:chemistry*; D011714:Pyrans / Q000737:chemistry* / Q000302:isolation & purification; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
D005960:Glucosides; D039823:Iridoids; D010936:Plant Extracts; D011714:Pyrans