Abstract: A compound of formula I or a pharmaceutically acceptable salt thereof, processes for preparing such compounds, their use as GPR119 modulators, methods for their therapeutic use, particularly in the treatment of obesity and diabetes mellitus, and pharmaceutical compositions containing them.

Abstract: A compound of formula (I): wherein: Ring A is a nitrogen linked mono or bicyclic heterocyclic ring as defined within; R1 and R2 are independently C1-3alkyl optionally substituted by fluoro or chloro; or R1 and R2 together with the carbon atom to which they are attached, form a C3-5cycloalkyl ring optionally substituted by fluoro; R3 is defined within; and n is 0-5; wherein the values of R3 may be the same or different; or a pharmaceutically acceptable salt or an in vivo hydrolysable ester thereof is described. The use of compounds of formula (I) in the production of an elevation of PDH activity in a warm-blooded animal such as a human being are also described. Pharmaceutical compositions, methods and processes for preparation of compounds of formula (I) are detailed.