allyl obtained from Brassica nigra by the action of water on sinigrin and myrosin or produced synthetically; a vesicant, used in 10% solution in 50% alcohol as a counterirritant in neuralgia. Gives mustard its characteristic flavor and aroma.
Synonym(s): volatile mustard oil
See Also: mustard oil
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Examples: glitazone, GI cocktail, etc.