| abstract |
The invention relates to the compounds of formula I<BR> wherein 'A' represent C, or N; 'D' represents a C<SB>5-10</SB> embrocyclic ring which can contain up to 3 atoms selected from N, O, or S; R<SB>1</SB>-R<SB>4</SB> represent H or substituent groups, and R<SP>5</SP> represents a C<SB>1-6</SB> alkyl group. These compounds are used for the treatment of COPD. |