| abstract |
Formula (I) (wherein A 1 , A 2 , A 3 , A 4 , R 1 , R 2 , R 3 , and R 4 are as defined in claim 1; or their salts or N-oxide). Furthermore, the present invention provides processes and intermediates for preparing compounds of formula (I), insecticidal, acaricidal, nematicidal or molluscicidal compositions containing them, and insects And methods of using them to control and control ticks, nematodes, or mollusc pests. |