A compound represented by the following general formula (I) (R1 and R2 represent hydrogen atom, an alkyl group, a halogen atom, etc. R3 and R4 represent hydrogen atom, an alkyl group, an alkoxy group, or an alkenyl group R5 represents hydrogen atom, an alkyl group, or nitro group, and R6 represents hydrogen atom or an alkyl group), which acts on the transcription process of genes.