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Constituents of the flower essential oil of Ageratina adenophora (Spreng.) K. et R. from India
Author(s) -
Weyerstahl Peter,
Marschall Helga,
Seelmann Ingo,
Kaul Vijay K.
Publication year - 1997
Publication title -
flavour and fragrance journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 70
eISSN - 1099-1026
pISSN - 0882-5734
DOI - 10.1002/(sici)1099-1026(199711/12)12:6<387::aid-ffj677>3.0.co;2-f
Subject(s) - chemistry , sesquiterpene , essential oil , confusion , stereochemistry , monoterpene , botany , traditional medicine , organic chemistry , chromatography , biology , medicine , psychology , psychoanalysis
The flower essential oil of Ageratina adenophora (Spreng.) of North Indian origin consists of 66% of monoterpenes and 28% of sesquiterpenes. Sixty‐four constituents were identified by their 1 H‐NMR spectra and GC–MS. Amorphene derivatives (10%), which are significant for A. adenophora , are main constituents of the sesquiterpene part. The structure of three novel natural products, amorpha‐4,7(11)‐diene, 5,8‐epoxyamorpha‐3,7(11)‐diene and amorpha‐4,7‐dien‐11‐ol, was confirmed by their 1 H‐ and 13 C‐NMR data. Some confusion in the literature concerning not only the stereochemistry of amorph‐4‐en‐7‐ol and muurol‐4‐en‐7‐ol but also the structure of amorph‐4‐en‐3,8‐dione and muurol‐4‐en‐3,8‐dione (‘eupatorenone’) was clarified. © 1997 John Wiley & Sons, Ltd.