Benzimidazole derivatives of formula (I): wherein: R1 is —；(CH2)m-R4 or R2 is halo, —；(CH2)m—；NH2 or —；(CH2)n—；C(═；NH)—；NH2； R3 is H or F； R4 is —；NH—；(CH2)2—；(NH)r—；R5, —；NH—；(CHR5R6) or a group of the following formula (A): (A) W is —；(CH2)m—；, —；CH2—；O—；CH2—；, —；CH2—；S—；CH2—；, —；(CH2)r—；S(O)2—；CH2—； or —；(CH2)r—；NR5—；CH2—；； m is an integer of 1 to 3； n is 1 or 2； p is 1 and V is CH； or p is O and V is N； q is 0 or 1； r is 0 or 1； R5 is H, —；SO2Me, —；SO2Et, —；SO2CF3, —；COMe, —；CONMe2, —；CONH2 or —；CH2CH2SO2Me； R6 is H or C1-C6 alkyl； and R7 is —；SO2Me, —；SO2Et, —；SO2CF3, —；COMe, —；CONMe2, —；CONH2 or —；CH2CH2SO2Me； and the pharmaceutically acceptable salts thereof are inhibitors of RSV and can therefore be used to treat or prevent an RSV infection.
