Wikipedia
Leptospermone
Leptospermone is a chemical compound (a β-triketone) produced by some members of the myrtle family ( Myrtaceae), such as Callistemon citrinus (Lemon Bottlebrush), a shrub native to Australia, and Leptospermum scoparium (Manuka), a New Zealand tree from which it gets its name. Allelopathic studies have led to the commercialization of derivative compounds as HPPD inhibitor herbicides.