%thujone%

‖n. An oil, C10H16O, the chief constituent of cedar leaf oil (thuja oil), which is obtained from the northern white cedar (arbor vitae, Thuja occidentalis) or the western Red Cedar (Thuja plicatis). It is a stimulant similar to camphor. It is also called thujol, thuyol, absinthol, thuyone, tanacetol, and tanacetone. Stedman. [ PJC ]