Compounds of the formula ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and n have the meanings reported in the specification, processes for their preparation and pharmaceutical compositions containing them as active ingredient are described. The compounds of formula I are inhibitor of enzymatic systems and they are useful in pharmaceutical field.
                            本发明描述了
化学式为##STR1##的化合物,其中R,R.sub.1,R.sub.2,R.sub.3,R.sub.4,R.sub.5和n的含义如规范中所述,以及其制备过程和含有它们作为活性成分的制药组合物。
化学式I的化合物是酶系统的
抑制剂,它们在制药领域中很有用。