FLAVENE AND THIOFLAVENE DERIVATIVES, PHARMACEUTICAL PREPARATIONS THAT CONTAIN SUCH COMPOUNDS, AND THE USE OF THE LATTER

摘要

Compounds of the formula I (I) wherein rings A and B are each unsubstituted or substituted; Y is oxygen, sulfur, sulfinyl or sulfonyl; one of the symbols Z1 and Z2 is halogen and the other formyl; and pharmaceutically acceptable salts of such compounds that contain a salt-forming group are useful for the treatment of diseases of the respiratory tract and of liver diseases. They are prepared by methods known per se.