Patent ID: 8536169

Claim:
A compound of formula (I): wherein R 1 is 9- or 10-membered bicyclic heteroaryl wherein the 9- or 10-membered bicyclic heteroaryl contains from one to three heteroatoms independently selected from oxygen and nitrogen and is optionally substituted by C 1-6 alkyl, C 3-6 cycloalkyl, halo or —CN; R 2 is —NHCOR 5 , R 3 is hydrogen or fluoro; R 4 is hydrogen or methyl; R 5 is phenyl optionally substituted by one or two substituents independently selected from C 1-6 alkyl, —OR 10 , halo, —NR 11 R 12 , and phenyl optionally substituted by halo; R 11 and R 12 are each independently hydrogen or C 1-6 alkyl; and R 10 is C 1-6 alkyl optionally substituted by from one to three fluoros; or a salt thereof.