1. Chemical constituents of Cinnamomum cebuense.
- Author
-
Ragasa CY, Espineli DL, Agoo EM, and Del Fierro RS
- Subjects
- Magnetic Resonance Spectroscopy, Philippines, Plant Bark chemistry, Plant Extracts isolation & purification, Plant Leaves chemistry, Triterpenes chemistry, Triterpenes isolation & purification, Cinnamomum chemistry, Plant Extracts chemistry
- Abstract
Aim: To investigate the chemical constituents of Cinnamomum cebuense, an endemic and critically endangered tree found only in Cebu, Philippines., Methods: The compounds were isolated by silica gel chromatography. The structures of the isolates were elucidated by NMR spectroscopy., Results: The dichloromethane (DCM) extract of the bark of C. cebuense afforded a new monoterpene natural product 1 and a new sesquiterpene 2, along with the known compounds, 4-hydroxy-3-methoxycinnamaldehyde (3), 4-allyl-2-methoxyphenol (4), α-terpineol (5) and humulene (6). The DCM extract of the leaves of C. cebuense yielded 6, β-caryophyllene (7), squalene (8), and a mixture of α-amyrin (9), β-amyrin (10) and bauerenol (11). The structures of 1-7 were elucidated by extensive 1D and 2D NMR spectroscopy, while the structures of 8-11 were identified by comparison of their (13)C NMR data with those reported in the literature., Conclusion: The bark of C. cebuense afforded monoterpenes, sesquiterpenes and phenolics, while the leaves yielded sesquiterpenes and triterpenes., (Copyright © 2013 China Pharmaceutical University. Published by Elsevier B.V. All rights reserved.)
- Published
- 2013
- Full Text
- View/download PDF