Xanthanolides in Xanthium L.: Structures, Synthesis and Bioactivity

Area of Science:

• Phytochemistry
• Pharmacology
• Medicinal Chemistry

Background:

• Xanthanolides are characteristic compounds of the *Xanthium* genus.
• These compounds exhibit broad biological effects, attracting significant pharmacological interest.
• Over 30 xanthanolides have been identified in monomeric, dimeric, and trimeric forms from *Xanthium* species.

Purpose of the Study:

• To review the structures and bioactivities of xanthanolides from the *Xanthium* genus.
• To summarize synthesis strategies for these compounds.
• To provide guidance for efficient preparation and explore prospects in the medicinal industry.

Main Methods:

• Literature review of structures and bioactivities.
• Survey of synthesis tactics.
• Bioassay-guided fractionation to identify active components.

Main Results:

• Over 30 xanthanolides isolated from *Xanthium*.
• Antitumor activity predominantly found in fractions from weak polar solvents.
• Xanthatin (compound 1) identified as the most effective and well-studied xanthanolide.

Conclusions:

• The diverse structures and structure-activity relationships of xanthanolides present a promising foundation for further research.
• Xanthanolides hold potential for medicinal applications, particularly in antitumor therapies.
• Further studies can guide efficient preparation and unlock the full medicinal potential of these compounds.