Complex sentence: Sulfoxaflor is a systemic insecticide which acts as an insect neurotoxin and is a member a class of chemicals called the neonicotinoids which act on the central nervous system of insects with much lower toxicity to mammals.
Split into simpler sentences: Sulfoxaflor is a systemic insecticide which acts as an insect neurotoxin. It is a member of a subclass of the neonicotinoids which act on the central nervous system of insects with much lower toxicity to mammals.