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<a href=http://cialis.lat/discover-the-best-prices-for-cialis>cheapest cialis online</a> iv a group CR 6 R 7 R 8 wherein R 6 and R 7 are each selected from hydrogen and methyl, and R 8 is selected from hydrogen, methyl, C 1 4 alkylsulphonylmethyl, hydroxymethyl and cyano; v a pyridazin 4 yl group optionally substituted by one or two substituents selected from methyl, ethyl, methoxy and ethoxy; vi a substituted imidazothiazole group wherein the substituents are selected from methyl, ethyl, amino, fluorine, chlorine, amino and methylamino; and vii an optionally substituted 1, 3 dihydro isoindol 2 yl or optionally substituted 2, 3 dihydro indol 1 yl group wherein the optional substituents in each case are selected from halogen, cyano, amino, C 1 4 mono and dialkylamino, CONH 2 or CONH C 1 4 alkyl C 1 4 alkyl and C 1 4 alkoxy wherein the C 1 4 alkyl and C 1 4 alkoxy groups are optionally substituted by hydroxy, methoxy, or amino; viii 3 pyridyl optionally substituted by one or two substituents selected from hydroxy, halogen, cyano, amino, C 1 4 mono and dialkylamino, CONH 2 or CONH C 1 4 alkyl, C 1 4 alkyl and C 1 4 alkoxy wherein the C 1 4 alkyl and C 1 4 alkoxy groups are optionally substituted by hydroxy, methoxy, or amino, but excluding the compounds 2 oxo 1, 2 dihydro pyridine 3 carboxylic acid 3 5 morpholin 4 ylmethyl 1H benzoimidazol 2 yl 1H pyrazol 4 yl amide and 2, 6 dimethoxy N 3 5 morpholin 4 ylmethyl 1H benzoimidazol 2 yl 1H pyrazol 4 yl nicotinamide; ix thiomorpholine or an S oxide or S, S dioxide thereof optionally substituted by one or two substitutents selected from halogen, cyano, amino, C 1 4 mono and dialkylamino, CONH 2 or CONH C 1 4 alkyl C 1 4 alkyl and C 1 4 alkoxy wherein the C 1 4 alkyl and C 1 4 alkoxy groups are optionally substituted by hydroxy, methoxy, or amino; and