Nepetalactol is thought to be the active component in Catpnip (Nepeta cataria), producing an opioid-like response in felines. Nepetalactol is a type of compound called iridoids which protect the plant against in aphids. It has been shown that this chemical can have mosquito-repellent properties1.
References
1.
MoutinhoJan. 20, S., 2021 & Pm, 2. Why cats are crazy for catnip. Science | aaas at https://www.sciencemag.org/news/2021/01/why-cats-are-crazy-catnip (2021).