Patent ID: 6946558

Claim:
A bipyridinyl compound of formula 1, a pharmaceutically acceptable salt or an optical isomer: Wherein, R is hydrogen; C 1 -C 6 -alkyl not substituted or substituted by halogen or hydroxyl; C 3 -C 7 -cycloalkyl; C 1 -C 5 -alkenyl not substituted or substituted by C 1 -C 3 -alkyl; C 1 -C 3 -alkoxy-C 1 -C 5 -alkyl; aryl-C 1 -C 5 -alkyl, phenyl not substituted or substituted by halogen, C 1 -C 6 -alkoxy or C 1 -C 6 -alkyl; or heteroaryl containing hetro atoms selected from a group comprising of nitrogen, sulfur and oxygen and not substituted or substituted by halogen, C 1 -C 6 -alkoxy or C 1 -C 6 -alkyl.