Compounds of formula (I)
where R1 is hydrogen; R2 is nitro, cyano or halo(lower)alkyl; R3 is phenyl substituted with one or more substituents selected from halogen, cyano and lower alkoxy; A is a lower alkylene group; R4 is a group CR6R7R8 wherein R6 and R7 form, together with the carbon atom to which they are attached a cycloalkyl group optionally substituted with hydroxy, lower alkoxy or a lower alkanoylamino; and R8 is hydrogen; its prodrug and a salt thereof.
化合物的
化学式(I),其中R1为氢;R2为硝基,
氰基或卤素(较低)烷基;R3为苯基,其中选择一个或多个取代基,所选取代基包括卤素,
氰基和较低烷氧基;A为较低的烷基烯基基团;R4为CR6R7R8基团,其中R6和R7与它们附着的碳原子一起形成一个环烷基团,该环烷基团可选择性地用羟基,较低烷氧基或较低烷酰胺基取代;而R8为氢;其前药和盐。