Abstract: This invention relates to a process for producing a composition comprising 4,4-dimethyl-6-isopropyl-1,2,3, 4-tetrahydronaphthalen-1-one. The composition of the invention is prepared by the oxidation of a 1,1-dimethyl-7-isopropyl -1,2,3,4-tetrahydronaphthalene raw material, which may be prepared by rearrangement and aromatization of longifolene. The invention also relates to perfume comprising the composition of the invention. The process uses organic acid salts of metals, including Cr, Fe, Mn, Ni, and the like, as oxidizing catalysts to produce the compound, which has a floral odor that diffuses easily and is long lasting. The fragrance of 4,4-dimethyl-6-isopropyl-1,2,3, 4-tetrahydronaphthalen-1-one is similar to various natural essential oils and their mixtures. Due to both its floral and woody odor, the 4,4-dimethyl-6-isopropyl-1,2,3, 4-tetrahydronaphthalen-1-one compound can be advantageously used as an ingredient in various types of perfumery materials.