Nine sesquiterpenes from Solanum torvum

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Organic Chemistry

Background:

• Solanum torvum is a plant species known for its diverse phytochemical constituents.
• Sesquiterpenes are a class of terpenes derived from six isoprene units.

Purpose of the Study:

• To isolate and characterize new and known sesquiterpenes from Solanum torvum roots.
• To investigate the structural and spectroscopic differences between epimeric sesquiterpenes.

Main Methods:

• Extraction and isolation of compounds from Solanum torvum roots.
• Structure elucidation using spectroscopic techniques, including Nuclear Magnetic Resonance (NMR) and single-crystal X-ray diffraction.

Main Results:

• Three new sesquiterpenes (1-3) and six known sesquiterpenes (4-9) were isolated.
• Compounds 2 and 3 are epimers, as are compounds 4 and 5, with distinct NMR spectral patterns.
• Compound 5 was confirmed by single-crystal X-ray diffraction.

Conclusions:

• The study expands the knowledge of Solanum torvum's chemical profile with the identification of novel sesquiterpenes.
• Steric effects in strained ring systems significantly influence NMR chemical shifts in epimeric sesquiterpenes.