Patent ID: 8431703

Claim:
A compound of formula (I) in free or salt form, wherein R 1 and R 2 are H; R 3 is C 1 -C 8 -alkyl; R 5 is R 5j and R 5k are independently selected from H, and C 1 -C 8 -alkyl optionally substituted by a 4- to 14-membered heterocyclic group or C 3 -C 15 -carbocyclic group, or R 5j and R 5k together with the nitrogen atom to which they are attached form a 4- to 14-membered heterocyclic group; R 6 is H or C 1 -C 8 -alkyl; W is a C 6 -C 15 -aromatic carbocyclic group or a 4- to 14-membered heterocyclic group; X is —SO 2 —, —CH 2 —, or —CON(Y)—; Y is C 1 -C 8 alkyl; and n is 1.