A compound of formula ##STR1##

wherein Y represents a pyridyl group, or a phenyl group of formula ##STR2##

wherein R₃ represents a hydrogen atom, a CF₃ group or an alkoxy group, R₄ represents a hydrogen atom, an alkyl group, or a CF₃ group, R₅ represents a hydrogen atom, an alkyl group, a CF₃ group or an alkoxy group, and R₁ and R₂ are the substituents of a terminal alkene of formula ##STR3##

wherein R₁ represents an alkyl or alkylene group, a mono- or poly-cycloalkyl group, or a phenyl group that optionally includes one or several hetero-atoms of oxygen, nitrogen, phosphorous or sulfur; R₂ represents a hydrogen atom, an alkyl or alkylene group, a mono- or poly-cycloalkyl group, or a phenyl group that optionally includes one or several hetero-atoms of oxygen, nitrogen, phosphorous and sulfur. This compound is capable of releasing, upon an exposure to light, an active compound such as a perfume and can be advantageously used in the treatment of any surface in order to perfume it through the controlled release of a perfumed molecule.