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Valeriana wallichii DC, a new chemotype from Northwestern Himalaya / Chandra S. Mathela in The journal of essential oil research, Vol. 17 N° 6 (Novembre-Décembre 2005) 

Public ISBD [article]  in The journal of essential oil research > Vol. 17 N° 6 (Novembre-Décembre 2005) . - pp. 672-675 Titre : Valeriana wallichii DC, a new chemotype from Northwestern Himalaya Type de document : texte imprimé Auteurs : Chandra S. Mathela, Auteur ; Mamta Tiwari, Auteur ; Subhash S. Sammal, Auteur Année de publication : 2006 Article en page(s) : pp. 672-675 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Valeriana  wallichii  Valerianaceae  Chemotypes  Essential  oil  composition  Maaliol  Viridiflorol  Patchouli  alcohol  8-acetoxy-patchouli  alcohol Résumé : The major constituents of the oils from roots and rhizomes of Valeriana wallichii DC were separated and characterized by GC, GC/MS and NMR (1H- and 13C-). The chemical compositions of the oils show two chemotypes within Valeriana wallichii. The type-I was characterized by presence of maaliol (64.3%), viridiflorol (7.2%) and sesquiterpene hydrocarbons (19.2%). The type-II contained patchouli alcohol (40.2%), viridiflorol (5.2%), 8-acetoxy-patchouli alcohol (4.5%) and sesquiterpene hydrocarbons (34.5%). Viridiflorol and 8-acetoxy-patchouli alcohol have been isolated from V. wallichii for the first time. Since the V. wallichii is being commercially used even today in Nepal and India as a substitute for V. officinalis, the sharp chemical differences among V. wallichii materials necessitates their identification before commercial exploitation for phytomedicines and flavor chemicals. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2005.9699029#.UcLXWWF2_n4 [article] Valeriana wallichii DC, a new chemotype from Northwestern Himalaya [texte imprimé] / Chandra S. Mathela, Auteur ; Mamta Tiwari, Auteur ; Subhash S. Sammal, Auteur . - 2006 . - pp. 672-675. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 17 N° 6 (Novembre-Décembre 2005) . - pp. 672-675 Mots-clés : Valeriana  wallichii  Valerianaceae  Chemotypes  Essential  oil  composition  Maaliol  Viridiflorol  Patchouli  alcohol  8-acetoxy-patchouli  alcohol Résumé : The major constituents of the oils from roots and rhizomes of Valeriana wallichii DC were separated and characterized by GC, GC/MS and NMR (1H- and 13C-). The chemical compositions of the oils show two chemotypes within Valeriana wallichii. The type-I was characterized by presence of maaliol (64.3%), viridiflorol (7.2%) and sesquiterpene hydrocarbons (19.2%). The type-II contained patchouli alcohol (40.2%), viridiflorol (5.2%), 8-acetoxy-patchouli alcohol (4.5%) and sesquiterpene hydrocarbons (34.5%). Viridiflorol and 8-acetoxy-patchouli alcohol have been isolated from V. wallichii for the first time. Since the V. wallichii is being commercially used even today in Nepal and India as a substitute for V. officinalis, the sharp chemical differences among V. wallichii materials necessitates their identification before commercial exploitation for phytomedicines and flavor chemicals. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2005.9699029#.UcLXWWF2_n4