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Iridoids from Rothmannia macrophylla.

S K Ling¹, T Tanaka, I Kouno

¹Faculty of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.

Journal of Natural Products

|June 26, 2001

Summary

Two novel iridoid compounds, macrophylloside and macrophyllide, were discovered in Rothmannia macrophylla leaves. Their unique structures were elucidated using advanced spectroscopic methods.

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Area of Science:

Phytochemistry
Natural Product Chemistry
Organic Chemistry

Background:

Rothmannia macrophylla is a plant species known for its potential medicinal properties.
Iridoids are a class of monoterpenes found in various plants, often exhibiting biological activity.

Purpose of the Study:

To isolate and characterize novel iridoid compounds from the leaves of Rothmannia macrophylla.
To elucidate the chemical structures of these newly discovered compounds.

Main Methods:

Isolation of compounds using chromatographic techniques.
Structure elucidation through Nuclear Magnetic Resonance (NMR) spectroscopy.
Mass Spectrometry (MS) for molecular weight determination and fragmentation analysis.

Main Results:

Two new iridoid compounds, named macrophylloside (1) and macrophyllide (2), were isolated.
Macrophylloside (1) is an iridoid glucoside with an ether linkage between C-3 and C-10.
Macrophyllide (2) is a novel nonglycosidic iridoid featuring an ether linkage between C-3 and C-6 and a lactonic linkage at C-1.
Six known iridoid compounds were also identified.

Conclusions:

The study successfully identified and characterized two new iridoid compounds from Rothmannia macrophylla.
The findings contribute to the understanding of the phytochemical profile of Rothmannia macrophylla and the diversity of iridoid structures.

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