title: Pogostemon hirsutus oil, rich in abietane diterpenes.
abstract: Volatile oil extracted from the leaves of Pogostemon hirsutus Benth., a rare species from Anamalai hills of the Western Ghats of Tamil Nadu, India was analyzed by GC-FID and GC-MS. Fifty-four compounds amounting to 90.8% of the oil were identified. The oil was rich in monoterpenes and diterpenes. The major components of the oil were alpha-pinene (11.5%), sabinene (8.5%), beta-pinene (5.2%), abietatriene (16.3%), dehydroabietal (3.5%) and dehydroabietol (21.0%). Abietane diterpenes are reported for the first time in the genus Pogostemon of Lamiaceae with six abietanes representing 42.6% of the oil.
authors.affiliation: Centre for Advanced Research in Indian System of Medicine, School of Chemical and Biotechnology, SASTRA University, Tirumalaisamudram, Thanjavur 613 401, India ramarmurugan@yahoo.com
authors.forename: Ramar
authors.initials: R
authors.lastname: Murugan
authors.forename: Gopal Rao
authors.initials: GR
authors.lastname: Mallavarapu
authors.affiliation: Centre for Advanced Research in Indian System of Medicine, School of Chemical and Biotechnology, SASTRA University, Tirumalaisamudram, Thanjavur 613 401, India
authors.forename: Veerappan
authors.initials: V
authors.lastname: Sudha
authors.affiliation: Centre for Advanced Research in Indian System of Medicine, School of Chemical and Biotechnology, SASTRA University, Tirumalaisamudram, Thanjavur 613 401, India
authors.forename: Pemaiah
authors.initials: P
authors.lastname: Brindha
mesh_terms: D045784:Abietanes / Q000032:analysis*; D019686:Lamiaceae / Q000737:chemistry*; D039821:Monoterpenes / Q000032:analysis*; D009822:Oils, Volatile / Q000737:chemistry*
chemical_list: D045784:Abietanes; D039821:Monoterpenes; D009822:Oils, Volatile