Salicylaldehyde be prepared from the corresponding phenol by the Duff reaction, or by treatment with paraformaldehyde in the presence of magnesium chloride and a base. Salicylaldehyde was identified as a characteristic aroma component of buckwheat. It is also one of the components of castoreum, the exudate from the castor sacs of the mature North American beaver ("Castor canadensis") and the European beaver ("Castor fiber"), used in perfumery. Furthermore, salicylaldehyde occurs in the larval defensive secretions of several leaf beetle species that belong the subtribe Chrysomelina. An example for a leaf beetle species that produces salicylaldehyde is the red poplar leaf beetle
Opium (perfume) Opium (perfume) Opium is an Oriental-spicy perfume created for fashion brand Yves Saint Laurent (YSL) by perfumer Jean Amic and Jean-Louis Sieuzac of Roure, first marketed in 1977. Its top notes are a mixture of fruit and spices, with mandarin orange, plum, clove, coriander and pepper, as well as bay leaf. Its floral middle notes consist predominantly jasmine, rose and Lily of the Valley, in addition to carnation, cinnamon, peach and orris root. It is underlined by the sweet woody base note containing sandalwood, cedarwood, myrrh, opopanax, labdanum, benzoin and castoreum, in addition to amber, incense, musk, patchouli, tolu and