Abstract: Provision of a TRPA1 activity inhibitor capable of reducing sensory irritation to skin or mucous membrane and an agent for reduction of sensory irritation for skin or mucous membrane. A TRPA1 inhibitor and an agent for reduction of sensory irritation for skin or mucous membrane comprising as an active ingredient a compound represented by the following formula (1) wherein R1 and R3 each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, R2 represents an alkyl group having 1 to 6 carbon atoms, R4 represents a hydrogen atom, a methyl group or an ethyl group, and a double line composed of a dotted line and a solid line represents a single bond or a double bond.

Abstract: Provision of a TRPA1 activity inhibitor capable of reducing sensory irritation to skin or mucous membrane and an agent for reduction of sensory irritation for skin or mucous membrane. A TRPA1 inhibitor and an agent for reduction of sensory irritation for skin or mucous membrane comprising as an active ingredient a compound represented by the following formula (1) wherein R1 and R3 each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, R2 represents an alkyl group having 1 to 6 carbon atoms, R4 represents a hydrogen atom, a methyl group or an ethyl group, and a double line composed of a dotted line and a solid line represents a single bond or a double bond.

Abstract: A combination of a musk with one or more ingredients of specific chemical structures in particular proportions makes it possible to obtain a fragrance composition which can mask an odor peculiar to an acidic hair cosmetic composition and is also excellent in long-term stability. By combining fragrant materials selected as desired from (E) ingredients each characterized primarily by the abundant release of a scent from foam, (F) ingredients each characterized primarily by the abundant release of a scent from a bottle mouth and (G) ingredients each characterized by good persistence of scent, an excellent fragrance composition can be obtained with a good balance among the abundant release of a scent from foam, the abundant release of a scent from a bottle mouth, and good persistence of scent.