Terpenes in the Essential Oil of Haplopappus laricifolius, Gray¹

Characterization of Volatile Constituents of Haplopappus greenei and Studies on the Antifungal Activity against Phytopathogens

“…This species produced a significant amount of resinous exudates from the twigs and leaves (1,2). Previous phytochemical investigations of Haplopappus species have revealed the presence of triterpenes (4,5), diterpenes (3,(6)(7)(8)(9)(10)(11)(12)(13)(14), flavonoids (5,(15)(16)(17)(18)(19)(20), coumarins (1,12,16,20,21), monoterpenes (22,23), and sesquiterpenes (22)(23)(24)(25)(26).…”

“…In the published literature only a few volatile compounds from Haplopappus species have been reported (23)(24)(25). For example, R-pinene, β-phellandrene, and phellandral were found as major compounds in the steam-distilled oil of the leaves and stems of H. laricifolius (24).…”

“…In the published literature only a few volatile compounds from Haplopappus species have been reported (23)(24)(25). For example, R-pinene, β-phellandrene, and phellandral were found as major compounds in the steam-distilled oil of the leaves and stems of H. laricifolius (24). Isocomene, modhelphene, 1,2,3,4-tetrahydro-1,1,5,6-tetramethylnaphthalene, β-caryophyllene, caryophyllene oxide, limonene, borneol, bornyl acetate, and carvone were reported in the H. heterophyllus volatile oil (25).…”