LAKTONHO, moddahoi organiki, efirhoi siklii dokhilii oksikislotaho. β–, γ– va dig. L. mavjudand. Az rui khosiyati khimiyavi ba efirhoi murakkabi asikli monand meboshand. L.-ro dar natijai siklizatsiyai galogenu oksikislotaho bo ishtiroki katalizatorho hosil mekunand. L. dar sintezi organiki, istehsoli moddahoi khushbuy va doruho istifoda meshavand. Baze L. (mas., klavosin) moddahoi faoli biologiand.