> just Google 2-heptanone

Amazing what you might find!

The application of smoke to honey bee (Apis mellifera) antennae reduced the
subsequent electroantennograph response of the antennae to honey bee alarm
pheromones, isopentyl acetate, and 2-heptanone. This effect was reversible, and
the responsiveness of antennae gradually returned to that of controls within
10-20 min. A similar effect occurred with a floral odor, phenylacetaldehyde,
suggesting that smoke interferes with olfaction generally, rather than specifically
with honey bee alarm pheromones.

Alarm Pheromone Perception in Honey Bees Is Decreased by Smoke
P. Kirk Visscher, Richard S. Vetter, and Gene E. Robinson
Journal of Insect Behavior, Vol. 8, No. 1, 1995

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