Lamivudinesulfoxide, (R)- is a metabolite of Lamivudine. Lamivudine is a potent nucleoside reverse transcriptase inhibitor and antiviral agent used for the treatment of chronic hepatitis B.
Biotin (R)-sulfoxide is a metabolite of the coenzyme biotin .1 1.Carling, R.S., and Turner, C.Methods for assessment of biotin (Vitamin B7)Laboratory assessment of vitamin status193-217(2019)