申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0344747A1
公开(公告)日:1989-12-06
A compound of the formula :
wherein
R¹ and R² are each lower alkyl,
R³ is hydroxy or acyloxy and R⁴ is hydrogen, or
R³ and R⁴ are linked together to form a bond, and
(i) Y is -S-, -O- or a group of the formula:
wherein
R⁷ is hydrogen, acyl or lower alkyl which may have suitable substituent(s), and
R⁵ and R⁶ are each hydrogen or lower alkyl,
(ii) Y is as defined above, and
R⁵ and R⁶ are linked together to form lower alkylene, or
(iii) Y-R⁵ is a heterocyclic group which may have suitable substituent(s), and
R⁶ is hydrogen or lower alkyl
and pharmaceutically acceptable salts thereof,
processes for their preparation and pharmaceutical compositions comprising them as an active ingredient in admixture with pharmaceutically acceptable carriers.
式中的化合物
其中
R¹ 和 R² 均为低级烷基、
R³ 是羟基或酰氧基,R⁴ 是氢,或
R³ 和 R⁴ 连接在一起形成键,以及
(i) Y 是-S-、-O-或式中的一个基团:
其中
R⁷ 是氢、酰基或可带有适当取代基的低级烷基,以及
R⁵ 和 R⁶ 均为氢或低级烷基、
(ii) Y 如上定义,且
R⁵ 和 R⁶ 连接在一起形成低级亚烷基,或
(iii) Y-R⁵ 是杂环基团,可带有合适的取代基,且
R⁶ 是氢或低级烷基
及其药学上可接受的盐类、
它们的制备工艺和药物组合物,其中包含它们作为活性成分与药学上可接受的载体的混合物。