Abstract: Disclosed herein are a liver specific delivery (LSD)-based antiviral prodrug nucleoside cyclophosphate compound and uses thereof. Specifically, this application provides a compound of formula (I), or an isomer, a pharmaceutically acceptable salt, a hydrate, a solvate or a pharmaceutical composition thereof. This application also provides an application of the compound alone or in combination with other antiviral drugs in the treatment for viruses, particularly hepatitis C virus (HCV).

Abstract: Disclosed are a liver specific delivery (LSD)-based antiviral prodrug nucleoside cyclophosphate compound and uses thereof, and in particular, provided are a compound of formula (I), and an isomer, a pharmaceutically acceptable salt, a hydrate and a solvate thereof, and the corresponding pharmaceutical composition. The present invention also provides uses of the present compounds, alone or in combination with other antiviral drugs, in the treatment of the diseases caused by hepatitis B virus (HBV), hepatitis D virus (HDV) and human immunodeficiency virus (HIV).

Abstract: Disclosed is a compound of formula (I-a) as an inhibitor of hepatitis C virus (HCV), or an optical isomer, a pharmaceutically acceptable salt, a hydrate or a solvate thereof, usable to treat HCV infections or hepatitis C diseases and also usable as an inhibitor of HCV non-structural protein 5A (NS5A) In the formula (I-a), A and A? are independently each R1, R4 and R6 are independently selected from the group consisting of fluorine, chlorine, bromine and iodine; R2 and R2? are independently selected from substituted or unsubstituted C1-C6 alkyl; R3 and R3? are independently selected from substituted or unsubstituted C1-C6 alkyl; R5 is selected from the group consisting of hydrogen, fluorine, chlorine, bromine and iodine; n is 2, 3, 4 or 5; m is 0, 1, 2 or 3; and p is 0, 1, 2 or 3.