Complex sentence: Modafinil originated with the late 1970s invention of a series of benzhydryl sulfinyl compounds, including adrafinil, which latter was first offered as an experimental treatment for narcolepsy in France in 1986.
Split into simpler sentences: Modafinil originated with the late 1970s invention of a series of benzhydryl sulfinyl compounds, including adrafinil. Adrafinil was first offered as an experimental treatment for narcolepsy in France in 1986.