Besifovir (LB80331), a parent drug converted by LB80380, further metabolizes to its active form, LB80317. LB80380 is potent antiviral agent against hepatitis B virus (HBV) [1][2].
[1]. Jung JA, et al. Pharmacokinetic comparison of the maleate and free base formulations of LB80380, a novel nucleotide analog, in healthy male volunteers. Int J Clin Pharmacol Ther. 2012 Sep;50(9):657-64. [2]. Yuen MF, et al. A randomized placebo-controlled, dose-finding study of oral LB80380 in HBeAg-positive patients with chronic hepatitis B. Antivir Ther. 2006;11(8):977-83.