Abstract: The present invention relates to a compound having the formula below which has an excellent inseciticidal activity: ##STR1## wherein R.sub.1 represents an optionally substituted 5-6 membered aromatic hetero ring containing nitrogen atom, except a non-substituted 2-pyridyl; x represents an optionally substituted C.sub.1-3 alkyleneR.sub.2 represents a hydrogen, a carbamoyl, a mono or di C.sub.1-5 alkyl carbamoyl, a thiocarbamoyl, a mono or di C.sub.1-5 alkylthiocarbamoyl, a sulfamoyl, a mono or di C.sub.1-5 alkylsulfamoyl, an optionally substituted C.sub.1-5 alkyl, an optionally substituted C.sub.2-5 alkenyl, an optionally substituted C.sub.2-5 alkynyl, an optionally substituted C.sub.3-8 cycloalkyl, an optionally substituted C.sub.3-8 cycloalkenyl, an optionally substituted aryl or --Y--R.sub.5 ;Y represents O, S(O).sub.n, CO, CS or CO.sub.2 ;n represents 0, 1 or 2;R.sub.5 represents a hydrogen, an optionally substituted C.sub.1-5 alkyl, an optionally substituted C.sub.2-5 alkenyl, an optionally substituted C.