15-Meth-oxy-14,15-di-hydro-andranginine

Area of Science:

• Natural Product Chemistry
• Organic Chemistry
• Crystallography

Background:

• Melodinus yunnanensis is a plant source of bioactive compounds.
• Polycyclic alkaloids represent a complex class of natural products with diverse structures.
• Understanding the three-dimensional structure of natural products is crucial for elucidating their biological activity.

Purpose of the Study:

• To isolate and characterize a novel polycyclic alkaloid from Melodinus yunnanensis.
• To determine the molecular structure and stereochemistry of the isolated compound.
• To investigate the crystal packing and intermolecular interactions.

Main Methods:

• Extraction and isolation of the alkaloid from plant material.
• Spectroscopic analysis (NMR, MS) for structural elucidation.
• Single-crystal X-ray diffraction for determining the solid-state structure.

Main Results:

• A polycyclic alkaloid, C22H26N2O3, an indole derivative, was isolated.
• The compound possesses three chiral centers and crystallizes as a racemate.
• The seven-membered heterocyclic ring exhibits a twisted conformation.
• N-H⋯O hydrogen bonds were observed, forming centrosymmetric dimers in the crystal.

Conclusions:

• The study reports the discovery and structural characterization of a new polycyclic alkaloid.
• The unique twisted conformation and dimeric structure provide insights into alkaloid structural diversity.
• Further research may explore the biological significance of this compound and its structural features.