Wiktionary
pulegone
n. (context organic compound English) A monoterpenoid ketone, found in pennyroyal, that is toxic to dogs and cats
Wikipedia
Pulegone
Pulegone is a naturally occurring organic compound obtained from the essential oils of a variety of plants such as Nepeta cataria ( catnip), Mentha piperita, and pennyroyal. It is classified as a monoterpene.
Pulegone is a clear colorless oily liquid and has a pleasant odor similar to pennyroyal, peppermint and camphor. It is used in flavoring agents, in perfumery, and in aromatherapy.