Simultaneous quantitative determination of eight triterpenoid monoesters from flowers of 10 varieties of Calendula officinalis L. and characterisation of a new triterpenoid monoester.
Dichloromethane extracts of dried flowers of Calendula officinalis contain eight known bioactive triterpendiol monoesters, namely, faradiol-3-O-palmitate, faradiol-3-O-myristate, faradiol-3-O-laurate, arnidiol-3-O-palmitate, arnidiol-3-O-myristate, arnidiol-3-O-laurate, calenduladiol-3-O-palmitate and calenduladiol-3-O-myristate. These pentacyclic terpenoids have been quantified simultaneously using reversed-phase HPLC with isocratic elution and internal standardisation. Of the 10 varieties of C. officinalis investigated, Calypso Orange Florensis produced the highest amounts of the bioactive monoesters, followed by Fiesta Gitana Gelb and May Orange Florensis. The lipophilic extract from the flowers of Calypso Orange Florensis variety also contained low levels of the newly characterised calenduladiol-3-O-laurate.
Laboratory of Bioorganic Chemistry, University of Trento, via Sommarive 14, 1-38050 Povo, Trento, Italy.
Hannes
H
Neukirch
Michele
M
D'Ambrosio
Josef
J
Dalla Via
Antonio
A
Guerriero
D020838:Calendula / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004952:Esters / Q000737:chemistry / Q000302:isolation & purification*; D035264:Flowers / Q000737:chemistry; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
D004952:Esters; D014315:Triterpenes