Complex sentence: Sulfoxaflor is a systemic insecticide which acts as an insect neurotoxin and is the first member a class of chemicals called the sulfoximines 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 the first member a class of chemicals called the sulfoximines which act on the central nervous system of insects with much lower toxicity to mammals.