| abstract |
The present invention provides a compound of formula I; n n n n n n n n n n or a pharmaceutically acceptable salt thereof, wherein R 1 , R 2 and R 3 are defined herein. The invention also relates to a method for manufacturing the compounds of the invention, and its therapeutic uses. The present invention further provides pharmaceutical composition of the compounds of the invention and a combination of pharmacologically active agents and a compound of the invention. |