The present invention provides a compound represented by formula (I) (in formula (I), R1and R2each independently represent a substituted or unsubstituted C1-6 alkyl group, R3represents a hydrogen atom or a substituted or unsubstituted C1-6 alkyl group, A represents a substituted or unsubstituted o-phenylene group, a substituted or unsubstituted benzylene group, and the like, B represents an oxy group, a substituted or unsubstituted oxymethylene group, and Q represents a substituted or unsubstituted o-phenylene group), or a salt thereof.本發明提供一種式(I)所表示之化合物或其鹽(式(I)中,R1表示經取代或未經取代之C1〜6烷基,R2表示經取代或未經取代之C1〜8烷基,R3表示氫原子或者經取代或未經取代之C1〜6烷基,A表示經取代或未經取代之鄰伸苯基、經取代或未經取代之伸苄基(benzylene group)等,B表示氧基、經取代或未經取代之氧基亞甲基等,且Q表示經取代或未經取代之鄰伸苯基)。