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Published on: January 26, 2016
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Cyclopentapeptides from Dianthus chinensis.
Jing Han1, Maobo Huang1,2, Zhe Wang1,2
1State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, PR China.
Summary
Researchers isolated a new cyclopentapeptide, dianthin I, and two known compounds from Dianthus chinensis. The novel structure cyclo-(Gly-L-Phe-L-Pro-L-Ser-L-Phe) was determined using spectroscopic and chemical methods.
Area of Science:
- Natural Product Chemistry
- Medicinal Chemistry
- Pharmacognosy
Background:
- Dianthus chinensis is a plant species known for its potential medicinal properties.
- Cyclopentapeptides are a class of cyclic peptides with diverse biological activities.
- Isolation and structural elucidation of novel compounds from plant sources contribute to drug discovery.
Purpose of the Study:
- To isolate and characterize chemical constituents from the aerial parts of Dianthus chinensis.
- To identify and determine the structure of a new cyclopentapeptide, dianthin I.
- To investigate the presence of known related compounds.
Main Methods:
- Extraction of bioactive compounds from the aerial parts of Dianthus chinensis.
- Chromatographic techniques (e.g., HPLC) for isolation of individual compounds.
- Spectroscopic analyses including NMR (1D and 2D) and Mass Spectrometry for structural elucidation.
- Chemical methods to confirm structural features.
Main Results:
- Isolation of a new cyclopentapeptide, dianthin I (1).
- Identification of two known cyclopentapeptides, pseudostellarin A (2) and heterophyllin J (3).
- Structural elucidation of dianthin I as cyclo-(Gly(1)-L-Phe(2)-L-Pro(3)-L-Ser(4)-L-Phe(5)) through comprehensive spectroscopic and chemical analyses.
Conclusions:
- Dianthus chinensis is a source of novel and known cyclopentapeptides.
- The newly identified dianthin I represents a unique cyclic peptide structure.
- The findings contribute to the understanding of the chemical diversity within the Dianthus genus and provide potential leads for further pharmacological investigation.
