GC-MS analysis of the anal sac secretion from the hog-nosed skunk,Conepatus mesoleucus, showed two major volatile components, (E)-2-butene-1-thiol and (E)-S-2-butenyl thioacetate. Minor volatile components identified from this secretion were phenylmethanethiol, 2-methylquinoline, 2-quinolinemethanethiol, and bis[(E)-2-butenyl] disulfide. 3-Methyl-1-butanethiol, a major component in the defensive spray of the striped skunk,Mephitis mephitis, and the spotted skunk,Spilogale putorius, was absent from this secretion.

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