Complex sentence: Isopropyl alcohol and its metabolite, acetone, act as central nervous system (CNS) depressants, and round 15 g of isopropyl alcohol can have a toxic effect on a 70 kg human if left untreated.
Split into simpler sentences: Isopropyl alcohol and its metabolite, acetone, act as central nervous system (CNS) depressants. Around 15 g of isopropyl alcohol can have a toxic effect on a 70 kg human if left untreated.