http://en.wikipedia.org/wiki/Oil_of_cloves
Oil of cloves, also Clove oil, is an essential oil from the clove plant. It is a natural analgaesic used primarily in dentistry for its active ingredient eugenol. It can also be purchased in pharmacies over the counter, as a local anaesthetic for dental pain relief, mainly toothache; it is also often found in the aromatherapy section of health food stores. The oil produced by cloves can be used in many things from flavouring medicine to remedies for bronchitis, the common cold, a cough, fever, sore throat and tending to infections. Its country of origin is India.
Oil of cloves is also useful in removing moulds from fabric and/or bathroom surfaces.