A new 6,9'-cyclolignan from Syringa pinnatifolia

Area of Science:

• Phytochemistry
• Natural Product Chemistry
• Organic Chemistry

Background:

• Syringa pinnatifolia is a plant species with potential for novel compound discovery.
• Lignans are a diverse class of phenolic compounds found in plants, known for various biological activities.

Purpose of the Study:

• To isolate and elucidate the structure of a new compound from the stem of Syringa pinnatifolia.
• To characterize the novel lignan using comprehensive spectroscopic techniques.

Main Methods:

• Isolation of the compound from plant extract.
• Structure elucidation using Ultraviolet (UV) spectroscopy.
• Infrared (IR) spectroscopy.
• Electrospray Ionization Mass Spectrometry (ESI-MS).
• 1D Nuclear Magnetic Resonance (NMR) spectroscopy.
• 2D NMR spectroscopy.

Main Results:

• A new lignan, identified as 4,4 '-dihydroxy-3,3 '-dimethoxy-6,9 '-cycloligna-7,8 '-dien-9 '-al, was successfully isolated.
• The structure of the isolated compound was definitively determined through detailed analysis of spectroscopic data.
• This represents the first report of this specific lignan structure.

Conclusions:

• The study successfully identified and characterized a novel lignan from Syringa pinnatifolia.
• The findings contribute to the understanding of the chemical constituents of Syringa species.
• The employed spectroscopic methods provide a robust framework for future natural product structure elucidation.