A compound of formula (I):Wherein A1,A2,A3,A4,G1,L,R1,R2,R3,R4,Y1,Y2and Y3are as defined in claim 1 or a salt or N-oxide thereof.Furthermore, the present invention relates to processes and intermediates for preparing compounds of formula (I), to insecticidal, acaricidal, molluscicidal and nematicidal compositions comprising them and to methods of using them to combact and control insects, acarine, mollusk and nematode pests.一種式(I)化合物:其中A1,A2,A3,A4,G1,L,R1,R2,R3,R4,Y1,Y2和Y3係如申請專利範圍第1項所定義;或其鹽或N-氧化物。再者,本發明係關於用於製備式(I)化合物的方法及中間產物,包括該等的殺昆蟲、殺蟎、殺軟體動物和殺線蟲的組合物,以及使用該等用於對抗和控制昆蟲、蟎、軟體動物和線蟲有害生物的方法。