| abstract |
(57) [Summary] X is O or S; R 1 and R 2 are independently of each other hydrogen, C 1-6 alkyl or C 3-6 cycloalkyl, or R 1 and R 2 are together with the carbon atoms to which are formed a C 3-6 cycloalkyl group; R 3 is hydrogen and R 4 is C 1-6 alkyl or C 3-6 cycloalkyl, or R 3 R 4 is a compound of formula (I) wherein, together with the carbon atom to which they are attached, form a C 3-6 cycloalkyl group. The compounds of the invention are used for treating or preventing allergic, inflammatory, autoimmune, proliferative and proliferative disorders. |