A compound represented by the following general formula (IA) or (IB) (R1 represents an electron withdrawing substituent, R2 and R3 represent a hydrogen atom or a halogen atom; R4 and R3 represent a hydrogen atom, an alkylcarbonyl group, or an alkylcarbonyloxymethyl group, and R6 represents a hydrogen atom or an alkyl group) or a salt thereof, and a reagent for measuring hydrogen peroxide comprising the compound or a salt thereof.
以下是该化合物的普遍式(I A)或(IB)(其中R1代表电子提取基团,R2和R3代表氢原子或卤素原子;R4和R3代表氢原子、烷基羰基基团或烷基羰氧甲基基团,R6代表氢原子或烷基基团)或其盐,以及用于测量
过氧化氢的试剂,包括该化合物或其盐。