Two new phenolic glycosides from Syringa reticulata

Area of Science:

• Phytochemistry
• Natural Product Chemistry
• Organic Chemistry

Background:

• Syringa reticulata, commonly known as Japanese tree lilac, is a plant species with potential medicinal applications.
• Phenolic glycosides are a class of natural compounds known for their diverse biological activities.
• Previous research has explored the chemical composition of various Syringa species, but detailed analysis of S. reticulata leaves is ongoing.

Purpose of the Study:

• To isolate and characterize novel and known phenolic glycosides from the leaves of Syringa reticulata.
• To elucidate the chemical structures of the isolated compounds using spectroscopic and chemical methods.
• To contribute to the phytochemical knowledge base of Syringa reticulata.

Main Methods:

• Extraction of plant material (leaves of Syringa reticulata).
• Isolation of compounds using chromatographic techniques (e.g., column chromatography).
• Structure elucidation using spectroscopic data (e.g., NMR, MS) and chemical derivatization.

Main Results:

• Two new phenolic glycosides, 3'-O-beta-D-glucopyranosysalidroside (1) and cis-echinacoside (2), were isolated.
• Four known phenolic glycosides, forsythoside B (3), decaffeoylacteoside (4), osmanthuside F (5), and (-)-olivil-4'-O-beta-D-glucopyranoside (6), were also identified.
• The structures of all six compounds were confirmed through comprehensive spectral and chemical analyses.

Conclusions:

• The leaves of Syringa reticulata contain a rich profile of phenolic glycosides.
• The identification of novel compounds expands the known phytochemical diversity of this species.
• This study provides valuable data for further research into the potential bioactivity and applications of compounds from Syringa reticulata.