Grass and leaf notes in perfume can be created with various green-smelling naturals and synthetics. Leaf alcohol, or cis-3-hexenol, is a top note that smells very much like freshly cut grass. It is an aroma chemical that can be derived from natural sources or created synthetically. Triplal is another aroma chemical with an intense green smell. Professionally designed green accords are also available, such as Green Ivy Givco.