Seudenone (3-methylcyclohex-2-en-1-one) is an antiaggregation pheromone of Douglas fir beetle, Dendroctonus pseudotsugae. Seudenol (3-methyl cyclohex-2-en-1-ol) is an aggregation pheromone of Douglas fir beetle, Dendroctonus pseudotsugae .

• 3-甲基环己 - 2 -烯 - 1 -酮 (Seudenone)是云杉红翅小蠹的抑制信息素 ；3-甲基环己 - 2 -烯- 1 -醇 (± -Seudenol)却是一种聚集信息素 .