Terpenoid composition of the wound-induced bark exudate of Commiphora tenuis from Ethiopia.
The bark of Commiphora tenuis Vollensen exudes a translucent, free-flowing odoriferous liquid upon wounding which was analysed by capillary GLC and GLC-MS. 42 mono- and sesquiterpenes were detected and 37 identified. The main components of the monoterpenoid fraction were alpha-pinene (60.8%), beta-pinene (8.8%), sabinene (6.3%), alpha-thujene (8.9%), limonene (5.5%), 3-carene (3.7%), beta-myrcene (1.8%), and beta-elemene (1.1%) constituting 97% of the oil. Identified sesquiterpenoid components constituted approximately 1.6% of the oil. Oleanolic acid acetate was isolated and identified as the main triterpene from the resin by 1H- and 13C-NMR. Three other triterpenes of the olean-12-ene group were also detected using GC-MS. The essential oil exhibited antibacterial activities against Staphylococcus aureus. Proteus mirabilis and E. coli with MIC between 0.5 and 1%.
K
K
Asres
A
A
Tei
G
G
Moges
F
F
Sporer
M
M
Wink
D000890:Anti-Infective Agents / Q000032:analysis* / Q000494:pharmacology; D002849:Chromatography, Gas; D005002:Ethiopia; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D010944:Plants / Q000737:chemistry*; D013729:Terpenes / Q000032:analysis* / Q000494:pharmacology
D000890:Anti-Infective Agents; D013729:Terpenes