Carbohydrate derivative or a salt thereof, agents to prevent and treat dermatopathy or dermatitis and to inhibit skin erythema and / or skin pigmentation, compound, use of a compound, and, process for preparing a carbohydrate derivative

摘要

"CARBOESTYRILLA DERIVED OR A SALT OF THIS, AGENTS TO PREVENT AND TREAT DERMATOPATHY OR DERMATITIS AND TO INHIBIT SKIN ERYTHEMA AND / OR SKIN PIGMENTATION, COMPOUND, USE OF A COMPOUND, AND, PROCESS TO PREPARE A CARBOEST DERIVED". The present invention provides an agent to inhibit erythema and / or skin pigmentation containing at least one selected from the group consisting of the carbostiril derivative and its salt represented by the general formula (1): where R ^ 1 ^ is a hydrogen atom, a lower alkyl group or something like that; R ^ 2 ^ is a hydrogen atom, a lower alkyl group, a lower alkoxy group or the like, R ^ 3 ^ and R ^ 4 ^ are lower alkyl groups that may have hydroxyl groups as substituents or the like, the carbon bond -carbon between positions 3 and 4 in the carbohydrate structure is a single bond or a double bond.