This invention provides a compound of the formula: ##STR1##

or its pharmaceutically acceptable salt thereof, wherein A is partially unsaturated or unsaturated five membered heterocyclic, or partially unsaturated or unsaturated five membered carbocyclic, wherein the 4-(sulfonyl)phenyl and the 4-substituted phenyl in the formula (I) are attached to ring atoms of Ring A, which are adjacent to each other; R¹ is optionally substituted aryl or heteroaryl, with the proviso that when A is pyrazole, R¹ is heteroaryl; R² is C_1-4 alkyl; halo-substituted C_1-4 alkyl, C_1-4 alkylamino, C_1-4 dialkylamino or amino; R³, R⁴ and R⁵ are independently hydrogen, halo, C_1-4 alkyl, halo-substituted C_1-4 alkyl or the like; or two of R³, R⁴ and R⁵ are taken together with atoms to which they are attached and form a 4-7 membered ring. R⁶ and R⁷ are independently hydrogen, halo, C_1-4 alkyl, halo-substituted C_1-4 alkyl, C_1-4 alkoxy, C_1-4 alkylthio, C_1-4 alkylamino or N,N-di C_1-4 alkylamino; and m and n are independently 1, 2, 3 or 4. This invention also provides a pharmaceutical composition useful for the treatment of a medical condition in which prostaglandins are implicated as pathogens.