PROBLEM TO BE SOLVED: To provide a diketone action inhibitor.SOLUTION: Provided is a compound represented by the general formula (II) and/or a salt thereof. (In the formula, R3, R4 and R5 each independently represents a hydrogen atom or a hydrocarbon group having a carbon number of 1-20, R6 and R7 each independently represents a hydrogen atom or an alkyl group having a carbon number of 1-4, and n represents an integer of 1-5.)COPYRIGHT: (C)2014,JPO&INPIT【課題】ジケトン作用抑制剤の提供。【解決手段】一般式(II)で表わされる化合物および/またはその塩。(式中、R3、R4およびR5はそれぞれ独立して水素原子または炭素数1~20の炭化水素基、R6およびR7はそれぞれ独立して水素原子または炭素数1~4のアルキル基、nは1~5の整数を示す)【選択図】なし