Germacrenes are a group of naturally occurring volatile organic hydrocarbons of the sesquiterpene and cycloalkene class. They are typically produced in plants and have antimicrobial and insecticidal properties, though they also play a role as insect pheromones.
The compounds of every Wikipedia article carrying a Chembox or a Drugbox, refreshed daily, with the values their infoboxes give. The pages need JavaScript; the API does not.