title: Constituents of south Indian vetiver oils.
abstract: The essential oils isolated from vetiver [Vetiveria zizanioides (L.) Nash.] roots collected from four locations in south India were analyzed by GC-FID and GC-MS. Eighty constituents, representing 94.5-97.8% of the oils, have been identified. The oils from Bangalore, Hyderabad, Kundapur, and Mettupalayam were rich in sesquiterpenes and oxygenated sesquiterpenes with cedrane, bisabolane, eudesmane, eremophilane, and zizaane skeletons. The main components of the four essential oils were: eudesma-4,6-diene (delta-selinene) + beta-vetispirene (3.9-6.1%), beta-vetivenene (0.9-9.4%), 13-nor-trans-eudesma-4(15),7-dien-11-one + amorph-4-en-10-ol (5.0-6.4%), trans-eudesma-4(15),7-dien-12-ol (vetiselinenol) + (E)-opposita-4(15),7(11)-dien-12-ol (3.7-5.9%), eremophila-1 (10),11-dien-2alpha-ol (nootkatol) + ziza-6(13)-en-12-ol (khusimol) (16.1-19.2%), and eremophila-1(10),7(11)-dien-2alpha-ol (isonootkatol) + (E)-eremophila-1(10),7(11)-12-ol (isovalencenol) (5.6-6.9%). The important compounds that impart the characteristic vetiver odor are: khusimene, delta-selinene, beta-vetivenene, cyclocopacamphan-12-ol (epimers A and B), vetiselinenol, khusimol, isovalencenol, khusimone, alpha-vetivone, and beta-vetivone. The chemical profiles of the oils are comparable to Haitian vetiver oil.
authors.affiliation: A-602, Renaissance Temple Bells, Opp. ISKCON Temple, Yeshwantpur, Bangalore 560022, India. grmallavarapu@yahoo.com
authors.forename: Gopal Rao
authors.initials: GR
authors.lastname: Mallavarapu
authors.forename: Kodakandla V
authors.initials: KV
authors.lastname: Syamasundar
authors.forename: S
authors.initials: S
authors.lastname: Ramesh
authors.forename: Bhaskaruni R Rajeswara
authors.initials: BR
authors.lastname: Rao
mesh_terms: D002849:Chromatography, Gas; D049930:Chrysopogon / Q000737:chemistry*; D003710:Demography; D007194:India; D010938:Plant Oils / Q000737:chemistry*
chemical_list: D010938:Plant Oils