Profiling of phenolics from Tephrosia cinerea

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Analytical Chemistry

Background:

• T. cinerea is a plant species with potential medicinal properties.
• Phenolic compounds are known for their diverse biological activities.
• Isolation and characterization of plant constituents are crucial for discovering new bioactive molecules.

Purpose of the Study:

• To rapidly identify and isolate phenolic constituents from the methanol extract of T. cinerea aerial parts.
• To characterize novel phenolic compounds from this plant source.

Main Methods:

• High-performance liquid chromatography coupled to electrospray positive ionization multistage ion trap mass spectrometry (HPLC-ESIMS(n)) for online screening.
• Isolation of compounds guided by HPLC-ESIMS(n) results.
• Structure elucidation using 1D and 2D Nuclear Magnetic Resonance (NMR) experiments.

Main Results:

• Seventeen phenolic constituents were identified and isolated.
• Two new compounds, demethylapollinin 7- O- β-D-glucopyranoside and cineroside A, were discovered.
• Structures of all isolated compounds were unambiguously assigned through extensive NMR analysis.

Conclusions:

• The study successfully identified and characterized phenolic constituents from T. cinerea.
• The application of HPLC-ESIMS(n) proved effective for rapid analysis and isolation guidance.
• The discovery of new compounds contributes to the phytochemical knowledge of T. cinerea.