2-Benzhydrylsulfinylacetic acid (Modafinil acid) is the metabolite of modafinil.
[1]. Gorman SH. Determination of modafinil, modafinil acid and modafinil sulfone in human plasma utilizing liquid-liquid extraction and high-performance liquid chromatography. J Chromatogr B Analyt Technol Biomed Life Sci. 2002 Feb 15;767(2):269-76.
















