Four new alkaloids from Consolida glandulosa

Area of Science:

• Natural Product Chemistry
• Organic Chemistry
• Phytochemistry

Background:

• Consolida glandulosa is a plant species known to produce various secondary metabolites.
• Diterpenoids represent a significant class of natural products with diverse biological activities.
• The hetisine-type diterpenoids are a specific subclass with unique structural features.

Purpose of the Study:

• To isolate and characterize new hetisine-type diterpenoids from Consolida glandulosa.
• To elucidate the chemical structures of these novel compounds.
• To provide further insights into the phytochemical profile of Consolida glandulosa.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure determination utilizing two-dimensional Nuclear Magnetic Resonance (2D-NMR) spectroscopy.
• Confirmation of structures through single-crystal X-ray diffraction analysis.

Main Results:

• Four new hetisine-type diterpenoids were successfully isolated and identified.
• The structures were assigned as 9-deoxyglanduline (1), glandulosine (2), 11,13-O-diacetylglanduline (3), and 9-O-acetylglanduline (4).
• The structure of compound 3 was unequivocally confirmed by single-crystal X-ray analysis.

Conclusions:

• The study successfully identified four novel hetisine-type diterpenoids from Consolida glandulosa.
• The structural elucidation was achieved through comprehensive spectroscopic analyses.
• These findings expand the knowledge of diterpenoids in the Consolida genus.