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Chemistry of the Genus Plectranthus
Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah-21589, P.O. Box 80203, Saudi Arabia
* Author to whom correspondence should be addressed.
Received: 21 May 2001; in revised form: 11 September 2001 / Accepted: 15 February 2002 / Published: 28 February 2002
Abstract: This review presents the phytochemical constituents of the genus Plectranthus reported up to 1999. Only a tetrameric derivative of caffeic acid was isolated from P. japonicus, but a group of long-chain alkylphenols, of possible taxonomic significance in the genus, was also isolated. As a genus of the subfamily Nepetoideae, Plectranthus is free from iridoid glycosides and rich in essential oil (i.e. > 0.5% volatile oil on a dry weight basis). Diterpenoids are the more common secondary metabolites in Plectranthus. The majority of them are highly modified abietanoids. This seems to be similar to the pattern of diterpenoids observed for Salvia, but no clerodane diterpenoids were found in Plectranthus.
Keywords: Plectranthus; Coleus; Labiatae; phytochemical constituents; abietane diterpenoids
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Abdel-Mogib, M.; Albar, H.A.; Batterjee, S.M. Chemistry of the Genus Plectranthus. Molecules 2002, 7, 271-301.
Abdel-Mogib M, Albar HA, Batterjee SM. Chemistry of the Genus Plectranthus. Molecules. 2002; 7(2):271-301.
Abdel-Mogib, M.; Albar, H. A.; Batterjee, S. M. 2002. "Chemistry of the Genus Plectranthus." Molecules 7, no. 2: 271-301.