The new chemical compound and the like which possesses melanin formation control activity is offered.Below-mentioned general formula (i)(Definition of the sign in formula sort of statement is in the bill) with the chemical compound which is displayed or that salt, and the said chemical compound or the beauty white medicine which contains that salt.メラニン生成抑制活性を有する新規化合物などを提供する。下記一般式(I)〔式中の記号の定義は、明細書に記載の通りである〕で表される化合物又はその塩、及び該化合物又はその塩を含有する美白剤。