Complex sentence: FMOs have been implicated in the metabolism of a number of pharmaceuticals, pesticides and toxicants, by converting the lipophilic xenobiotics into polar, oxygenated, and readily excreted metabolites.
Split into simpler sentences: FMOs have been implicated in the metabolism of a number of pharmaceuticals, pesticides and toxicants. They do this by converting lipophilic xenobiotics into polar, oxygenated, and readily excreted metabolites.