| abstract |
In the general formula (I) of the compounds of the present invention, n is 0, 1 or 2 R is nitrophenyl, 1,2,3-benzothiazin-4-yl, 1,3,5-triazin-2-yl or 4 , 5-dihydrothiazol-2-yl or optionally substituted phenyl, thienyl, isoxazolyl, isothiazolyl, xyloyl, thiazolyl, imidazolyl, pyrazolyl, tetrazolyl, oxadiazolyl, thiadadiazolyl, thiadadiazolyl, , pyridazinyl, pyrazinyl or 1,2,4-triazinyl. Salts of the above compounds are also within the scope of this invention. ŕ |