prov:value
| - odiment of the first aspect of the present invention is a compound of the third embodiment of the first aspect wherein: R.sup.2 is selected from the group consisting of hydrogen, methoxy and fluoro; R.sup.5 is heteroalicyclic,said heteroalicyclic selected from the group consisting of 5-oxo-4,5-dihydro-[1,2,4]oxadiazol-3-yl, 4,5-dihydro-thiazol-2-yl, 5-oxo-4,5-dihydro-[1,3,4]oxadiazol-2-yl and 4,5-
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