Abstract: A fragrance precursor represented by formula (1): wherein R1 represents a hydrogen atom, an alkyl group having a carbon number of 1 to 12, a hydroxy group, a methoxy group or an ethoxy group R2 represents a single bond, an alkylene group having a carbon number of 1 to 2, which may have a substituent, or a vinylene group which may have a substituent; and R3 represents a residue resulting from removal of one hydrogen atom of a hydroxy group from a fragrance alcohol having a carbon number of 5 to 20 or a phenol which may have a substituent.

Abstract: A method for releasing an aldehyde or ketone of formula (2) by allowing a hydrolase to act on a compound of formula (1) is disclosed. The compound of formula (1) is used as a flavor or fragrance precursor.

Abstract: A fragrance precursor represented by formula (1): wherein R1 represents a hydrogen atom, an alkyl group having a carbon number of 1 to 12, a hydroxy group, a methoxy group or an ethoxy group R2 represents a single bond, an alkylene group having a carbon number of 1 to 2, which may have a substituent, or a vinylene group which may have a substituent; and R3 represents a residue resulting from removal of one hydrogen atom of a hydroxy group from a fragrance alcohol having a carbon number of 5 to 20 or a phenol which may have a substituent.

Abstract: The invention relates to a method for releasing an aldehyde or ketone of formula (2) by allowing a hydrolase to act on a compound of formula (1). The compound of formula (1) is used as a flavor or fragrance precursor. In formula (1), each of R1, R2 and R3 independently represents a hydrogen atom, an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an alkenyl group which may have a substituent, an aryl group which may have a substituent, or an aralkyl group which may have a substituent. R1 and R2 or R1 and R3 may form a ring. Ar represents an aryl group which may have a substituent. In formula (2), R1, R2 and R3 have the same definitions as those in formula (1).

Abstract: The present invention relates to a method for releasing an unsaturated aldehyde or ketone represented by the general formula (2) by irradiating the compound represented by the general formula (1) with light, in which the compound represented by the general formula (1) is used as a flavor or fragrance precursor:

Abstract: The present invention relates to a method for releasing an unsaturated aldehyde or ketone represented by the general formula (2) by irradiating the compound represented by the general formula (1) with light, in which the compound represented by the general formula (1) is used as a flavor or fragrance precursor:

Abstract: The present invention provides an aqueous liquid fragrance composition which contains a fragrance, gluconate, an anionic surfactant, a non-ionic surfactant and water, the sum of the amounts of the anionic surfactant and the non-ionic surfactant contained per 1 part by weight of the fragrance being 0.3 to 1.4 parts by weight, and also provides an aqueous liquid fragrance using the same. By containing gluconate, an anionic surfactant and a non-ionic surfactant in an aqueous liquid fragrance composition, this composition of the present invention makes it possible to reduce the amount of a surfactant for solubilizing the fragrance in water. In the present invention, reducing the amount of a surfactant for solubilizing the fragrance in water makes it possible to provide an aqueous liquid fragrance composition and aqueous liquid fragrance using the same whereby favorable volatility can be upheld during use, transparency can be maintained, and the appearance will not be adversely affected.