Triterpenoids from Eugenia grandis: structure elucidation by NMR spectroscopy

✍ Scribed by Karuppiah Pillai Manoharan; Fan Jing Song; Tan Kwong Huat Benny; Daiwen Yang

• Book ID: 102526667
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 145 KB
• Volume: 45
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1954

✦ Synopsis

Abstract

A new pentacyclic triterpenoid, 2α,3β‐dihydroxylup‐12‐en‐28‐oic acid (1) and a rarely encountered pentacyclic triterpenoid, 3β‐hydroxylup‐12‐en‐28‐oic acid (2), together with five known compounds, friedelin (3), 3β‐friedelinol (4), betulinic acid (5), oleanolic acid (6) and β‐sitosterol (7) were isolated from the chloroform extract of stem bark of Eugenia grandis (Syn: Syzygium grande). The structure and stereochemistry of the new compound (1) and the rarely encountered compound (2) were established by 1D and 2D NMR spectroscopic techniques. All the above isolated compounds from this plant are reported for the first time. Copyright © 2007 John Wiley & Sons, Ltd.