The present invention provides compounds of the formula wherein R1 is selected from the group consisting of H and CH3 R2 is selected from the group con+sisting of H and CH3 R3 is selected from the group consisting of H, C1-C3 alkyl, O(CH2)3SO2CH3, O(CH2)2OCH3, O(CH2)2C(CH3)2OH, CN, and OCF2 or a pharmaceutical salt thereof, methods of treating diabetes, intermediates, and a process for preparing compounds of the invention.本發明提供下式之化合物其中R1選自由H及CH3組成之群;R2選自由H及CH3組成之群;R3選自由以下組成之群:H、C1-C3烷基、O(CH2)3SO2CH3、O(CH2)2OCH3、O(CH2)2C(CH3)2OH、CN及OCF2;或其醫藥鹽、治療糖尿病之方法、製備本發明化合物之中間體及製程。
