Glycosidic constituents from Carpesium cernuum L

Area of Science:

• Phytochemistry
• Natural Product Chemistry
• Organic Chemistry

Background:

• Carpesium cernuum L. is a plant species with a history of traditional medicinal use.
• The chemical constituents of C. cernuum L. are not fully characterized, particularly its glycosidic compounds.
• Glycosides are important in plant physiology and can possess significant biological activities.

Purpose of the Study:

• To isolate and characterize novel glycosidic compounds from the aerial parts of Carpesium cernuum L.
• To identify and elucidate the structures of new neolignan glucosides and monoterpenoid diglycosides.
• To contribute to the phytochemical knowledge of the Carpesium genus.

Main Methods:

• Extraction of secondary metabolites from the aerial parts of Carpesium cernuum L.
• Chromatographic techniques (e.g., column chromatography) for compound isolation.
• Spectroscopic analyses (e.g., NMR, MS) for structural elucidation of isolated compounds.
• Chemical derivatization and degradation for structural confirmation.

Main Results:

• Isolation of two new 8-O-4'-neolignan glucosides, designated Carpesides A (1) and B (2).
• Isolation of one new monoterpenoid diglycoside, eupatriol 9-O-beta-d-apiofuranosyl-(1 --> 6)-beta-d-glucopyranoside (3).
• Identification of 10 known glycosidic compounds from the same plant source.

Conclusions:

• The study successfully identified novel glycosidic compounds from Carpesium cernuum L.
• The structural elucidation of Carpesides A and B, and the new monoterpenoid diglycoside provides new chemical entities.
• This research expands the repertoire of known natural products from C. cernuum L. and contributes to the understanding of its chemical diversity.