Compounds of the formula (1) :
and pharmaceutically acceptable salts are described wherein
is a ring of sub-formula (a), (b) or (c):
X is oxygen or sulphur, and
R¹ is C₁₋₆alkyl, C₂₋₆alkenyl, C₃₋₅cycloalkylC₁₋₄alkyl, or C₁₋₄alkyl substituted by 1 to 6 fluoro groups.
Their use as medicaments, pharmaceutical compositions containing them and processes for their preparation are also described.
描述了式 (1) :
及药学上可接受的盐类,其中
是子式(a)、(b)或(c)的环:
X 是氧或
硫,以及
R¹ 是 C₁₋₆烷基、C₂₋₆烯基、C₃₋₅烷基或被 1 至 6 个
氟基团取代的 C₁₋₄ 烷基。
此外,还介绍了它们作为药物的用途、含有它们的药物组合物及其制备工艺。