Abstract: Use of a compound which is a biphenyl derivative of formula (I), or a pharmaceutically acceptable salt thereof, for the treatment of Hepatitis C wherein the variables are described herein.

Abstract: The invention provides compounds of formula (I) wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11 and R12 are as defined in the specification, and optical isomers, racemates and tautomers thereof, and pharmaceutically acceptable salts thereof; together with processes for their preparation, pharmaceutical compositions containing them and their use in therapy. The compounds are useful in the treatment of respiratory syncytial virus (RSV).

Abstract: A quinazoline derivative of formula (I), or a pharmaceutically acceptable salt thereof: formula (I) for use in treatment of prevention of a flaviviridae infection.

Abstract: Compounds of formula (Ia) are found to be active in inhibiting replication of flaviviridae viruses (Ia), wherein R1 and R2 are the same or different and represent hydrogen, halogen, -L-O—R3, -L-O-L-A or -L-O-L?-A?, wherein each L is the same or different and represents a direct bond or a C1-C4 alkylene group; L? represents a direct bond or a C2-C4 alkylene group; R3 represents hydrogen, C1-C4 alkyl or C1-C4 haloalkyl; A represents a 5- to 10-membered heterocyclyl group; and A? represents a C6-C1 aryl group; wherein at least one of R1 and R2 is -L-O—R3, -L-O-L-A or -L-O-L?-A?.

Abstract: A compound which is a biphenyl derivative of formula (I), or a pharmaceutically acceptable salt thereof wherein: R1 is a C1-C6 alkyl group or a moiety -A1, -L1-A1, -A1-A1?, -L1-A1-A1?, -A1-L1-A1?, -A1-Y1-A1?, -A1-Het1-A1?, -L1-A1-Y1-A1?, -L1-A1-Het1-A1?, -L1-Het1-A1, -L1-Y1-A1, -L1-Y1-Het1-A1, -L1-Het1-Y1-A1, -L1-Y1-Het1-L1?, -A1-Y1-Het1-A1?, -A1-Het1-Y1-A1?, -A1-Het1-L1-A1?, -A1-L1-Het1-A1? or -L1-Het1-L1?; -A and B are the same or different and each represent a direct bond or a —CO—NR?—, —NR?—CO—, —NR?—CO2—, —CO—, —NR?—CO—NR?—, —NR?—S(O)2—, —S(O)2—NR?—, —SO2—, —NR?—, —NR?—CO—CO—, —CO—O—, —O—CO—, —(C1-C2 alkylene)-NR?— or —(C1-C2 hydroxyalkylene)-NR?-moiety, wherein R? and R? are the same or different and each represent hydrogen or C1-C4 alkyl; —R2 and R3 are the same or different and each represent C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl, C1-C4 haloalkoxy or halogen; n and m are the same or different and each represent 0 or 1; R4 is a C1-C6 alkyl group or a moiety -A4, -L4-A4, -A4-A4?, -L4-A4-A4?, -A4-L4