Tocopheryl acetates from the pupal exocrine secretion of the squash beetle, Epilachna borealis (Coccinellidae).
The oily droplets on the pupal integumental hairs of the squash beetle Epilachna borealis contain a mixture of alpha-, beta-, gamma-, and delta-tocopheryl acetates as major constituents. In addition, the secretion contains a number of minor components that appear to be dehydrocongeners of the major components. This is the first report of the occurrence of acetate esters of any tocopherol in nature.
Attygalle
A B
AB
Department of Chemistry, Cornell University, Ithaca, New York 14853-1301, USA.
Smedley
S R
SR
Eisner
T
T
Meinwald
J
J
D000818:Animals; D001517:Coleoptera / Q000502:physiology*; D005088:Exocrine Glands / Q000378:metabolism*; D008401:Gas Chromatography-Mass Spectrometry; D013058:Mass Spectrometry; D015394:Molecular Structure; D011679:Pupa / Q000502:physiology; D017550:Spectroscopy, Fourier Transform Infrared; D024505:Tocopherols; D014810:Vitamin E / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism; D024502:alpha-Tocopherol / Q000031:analogs & derivatives*
D014810:Vitamin E; D024502:alpha-Tocopherol; D024505:Tocopherols