Related Experiment Video
Updated: Jul 18, 2026

A Customizable Approach for the Enzymatic Production and Purification of Diterpenoid Natural Products
Published on: October 4, 2019
Compositional diversity of terpenoids in the Himalayan Valeriana genera
Chandra S Mathela1, Chandan S Chanotiya, Subhash S Sammal
1Department of Chemistry, Kumaun University, Nainital-263002, India. mathelacs@rediffmail.com
Abstract:
In an effort to determine the chemical diversity of the Valeriana genera of the Northwestern Himalaya (Uttaranchal), V. wallichii, V. himalayana (syn. V. dioica), V. pyrolaefolia, and V. hardwickii var. arnottiana were investigated for their terpenoid compositions by means of GC and GC/MS analyses of their essential oils, as well as by one- and two-dimensional NMR studies of the isolates. Our results establish that V. wallichii DC. includes two stable chemotypes, with no mixed population, chemotype I being characterized by the presence of maaliol (1), and chemotype II having patchouli alcohol (2) and 8-acetoxypatchouli alcohol (3) as major compounds. V. hardwickii var. arnottiana was also found to exist as two independent chemotypes. Here, chemotype I is characterized by alpha-kessyl acetate (4), valeracetate (5), and 8-epikessyl glycol diacetate (6), whereas the chemotype-II species contain maaliol (1) and kessanyl acetate (7). V. himalayana Grub. had maaliol (1), valeranone (8), kessane (9), and alpha-kessyl acetate (4) as major compounds, and V. pyrolaefolia Decne. contained patchouli alcohol (2) and valeranone (8) as markers.
More Related Videos
Related Concept Videos
Aromatic Compounds: Overview
In 1825, Faraday isolated benzene...
Biodiversity and Human Values
Stereoisomerism of Cyclic Compounds
Aromatic Hydrocarbon Anions: Structural Overview
Due to the absence of continuous overlap of p...
Five-Membered Heterocyclic Aromatic Compounds: Overview
Nomenclature of Aromatic Compounds with Multiple Substituents
For disubstituted benzene derivatives, with two groups attached to the benzene ring, three constitutional isomers are possible. For example, consider dimethyl benzene, often called xylene, where the second methyl group can be substituted at the second, third, or fourth carbon. The relative position of the substituents is represented by prefixes ortho, meta, or...

