title: Sesquiterpene constituents of the liverwort Calypogeia muelleriana.
abstract: The lipophilic constituents of the liverwort Calypogeia muelleriana were investigated. A new sesquiterpene hydrocarbon, maali-1,3-diene, and two sesquiterpene alcohols with an aromadendrane skeleton, 3-hydroxyledene and 4,5-dehydroviridiflorol, were isolated and identified. The structure elucidation was carried out mainly by NMR spectroscopic techniques ((1)H-, (13)C-, (1)H(1)H-COSY-, HMQC-, HMBC- and NOESY experiments). The majority of the constituents of the liverwort volatiles show a conspicuous biogenetic relationship, which becomes even more obvious in the stereochemical correlations.
authors.affiliation: Institut für Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, d-20146, Hamburg, Germany
authors.forename: Ute
authors.initials: U
authors.lastname: Warmers
authors.forename: Kolja
authors.initials: K
authors.lastname: Wihstutz
authors.forename: Nils
authors.initials: N
authors.lastname: Bülow
authors.forename: Christiane
authors.initials: C
authors.lastname: Fricke
authors.forename: Wilfried A.
authors.initials: WA
authors.lastname: König