| 摘要 |
Compounds of formula <CHEM> in which, X<1> is C2-6 alkyl, (CH3)2C = CHCH2 or phenyl; X<2> and X<3> are each hydrogen or, when X<1> is C2-6 alkyl, X<2> and X<3> together can also form a carbon atom bond; Y is selected from the group consisting of -CO2H, -CH2OH, @@CH2OH and -@H(CH2)nCO2H wherein n is 2 or 3 and Z is hydroxyl or hydrogen; and R is selected from the imidazolyl radical of the following formulae (A) or (B) <CHEM> wherein R1 is hydrogen, C1 to C4 alkyl or C3 to C4 alkenyl, R2 is hydrogen, C1 to C4 alkyl, carboxl or carboxamido, or either -(CH2)pCO2H or -(CH2)pCONH2, wherein p is 1 ro 2, when R1 and R3 are hydrogen or C1 to C4 alkyl, and R3 is hydrogen, C1 to C4 alkyl or -CH2CO2H with the proviso that R1, R2 and R3 cannot all be hydrogen or <CHEM> wherein R4 is hydrogen, C1 to C4 alkyl or C3 to C4 alkenyl, R5 is hydrogen, C1 to C4 alkyl or C3 to C4 alkenyl and R6 is hydrogen or carboxyl with the proviso that R4, R5 and R6 cannot all be hydrogen; or a pharmaceutically acceptable salt thereof; processes for their preparation, pharmaceutical compositions containing them and their use in the treatment of diseases in which leukotrienes are a factor e.g. asthma. |
