Febuxostat 67M-1 is an active metabolite of Febuxostat. Febuxostat 67M-1 retains inhibitory activity against Xanthine Oxidase, but its plasma concentration is much lower than that of Febuxostat. Febuxostat 67M-1 can be used in the research of hyperuricemia [1].
References:
[1]. Xie H, et al. An HPLC-MS/MS method for simultaneous determination of the active metabolites of febuxostat (67M-1, 67M-2 and 67M-4) in human plasma. Journal of chromatography. B, Analytical technologies in the biomedical and life sciences. 2014 Nov 01;970:24-30.
References:
[1]. Xie H, et al. An HPLC-MS/MS method for simultaneous determination of the active metabolites of febuxostat (67M-1, 67M-2 and 67M-4) in human plasma. Journal of chromatography. B, Analytical technologies in the biomedical and life sciences. 2014 Nov 01;970:24-30.