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A cyclic heptapeptide from Vaccaria segetalis
1Department of Pharamacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan.
Phytochemistry
|May 1, 1996
Summary
Researchers isolated a new cyclic heptapeptide, segetalin E, from Vaccaria segetalis seeds. Its structure was determined using advanced NMR techniques and chemical analysis.
Area of Science:
- Natural Product Chemistry
- Organic Chemistry
- Medicinal Chemistry
Background:
- Vaccaria segetalis seeds are a source of bioactive compounds.
- Cyclic heptapeptides represent a class of molecules with diverse biological activities.
Purpose of the Study:
- To isolate and characterize novel cyclic heptapeptides from Vaccaria segetalis.
- To elucidate the chemical structure of the new compound segetalin E.
Main Methods:
- Isolation of segetalin E from Vaccaria segetalis seeds.
- Structure elucidation using extensive two-dimensional Nuclear Magnetic Resonance (2D-NMR) methods.
- Confirmation of structure through chemical degradation studies.
Main Results:
- A new cyclic heptapeptide, designated segetalin E, with the sequence cyclo(-Gly-Tyr-Val-Pro-Leu-Trp-Pro-) was successfully isolated.
- The complete structure of segetalin E was unambiguously determined.
- The isolation and characterization contribute to the understanding of secondary metabolites in Vaccaria segetalis.
Conclusions:
- Segetalin E is a novel cyclic heptapeptide isolated from Vaccaria segetalis.
- The study successfully elucidated the structure of segetalin E using comprehensive spectroscopic and chemical methods.
- This finding expands the known repertoire of natural products from this plant species.