abstract |
PCT No. PCT/GB93/02197 Sec. 371 Date May 3, 1995 Sec. 102(e) Date May 3, 1995 PCT Filed Oct. 25, 1993 PCT Pub. No. WO94/09780 PCT Pub. Date May 11, 1994Piperazine derivatives of formula (I) are useful in the treatment of cognitive disorders. In formula (I), X is a group of (IIa): -(CH2)nCR2R3CONR4R5 or (IIIb): -A-NR6COR7 where n, A, R, R1, R2, R3, R4, R5, R6 and R7 have specified meanings. <IMAGE> (I) |