A compound of formula (I) wherein R1 to R4 are, for example, each hydrogen, R5 is pyridyl, which has two or more substituents selected, for example, from halogen, C1-C4-alkyl, C1-C4-haloalkyl, C1-C4-alkoxy, C1-C4-haloalkoxy, and cyano； R6 is, for example, hydrogen； R7 is, for example, hydrogen, cyano, hydroxyl, formyl, C1-C4-alkyl, C1-C4-alkoxy, C2-C4-alkenyl, or C2-C4-alkynyl； and A1 to A5 are, independently selected, from, for example, N, and C&mdash；H； and its use as a pesticidal agent.
