| abstract |
The present invention discloses compounds of formula (I), or a pharmaceutically acceptable salt thereof; wherein n is 1 or 2 or 3, A is -O-, -S-, -CH2-, -O-CH2-, or -CH2-O-; B is -O-, -S-, -CH2-, -O-CH2-, or -CH2-O-; and C is N, or -CR1-; D is N, or -CR2-; E is N, or -CR3-; and F is N, or -CR4-; wherein R1, R2, R3 and R4 each independently are selected from the group consisting of alkyl, cycloalkyl, cycloalkylalkyl, alkenyl, alkynyl, alkoxy, cycloalkoxy, thioalkoxy, thiocycloalkoxy, methylenedioxy, aryloxy, halogen, CF3, OCF3, CN, amino, nitro, aryl and a monocyclic 5 to 6 membered heteroaryl group. The compounds of the invention are useful for the treatment of disorders or diseases responsive to the activity of nicotinic ACh receptor modulators. |