| abstract |
There are disclosed compounds of the formula (I) or a pharmaceutically acceptable salt thereof, wherein R is optionally substituted phenyl. cycloalkenyl or heteroaryl, X is alkylene or -. C (O) CH-, Y is -N (R) CHCHN (R) -, - OCHCHN (R) -, -O-, -S-, -CHS-, - (CH) -NH-, or optionally substituted , (Ia) ,. m and n are 2-3, and Q is nitrogen or optionally substituted carbon, and Z is optionally substituted phenyl, phenylalkyl or heteroaryl, diphenylmethyl, RC (O) -, RSO-, ROC (0) -, R C (O) -, RN (R) -C (S) -, phenyl-CH (OH) - or phenyl-C (= NOR) -, or if Q is CH, (Ib), |