The present invention provides a condensed furan compound of the formula (I):
wherein Ring X is benzene, pyridine, or the like; Y is an optionally substituted amino, an optionally substituted cycloalkyl, an optionally substituted aryl, an optionally substituted saturated heterocyclic group, an optionally substituted unsaturated heterocyclic group; A is a single bond, lower alkylene, lower alkenylidene, lower alkenylene or an oxygen atom; R3 is hydrogen or the like; and, R4 is hydrogen, or the like, or pharmaceutically acceptable salts thereof, which is useful as a medicament, particularly, as an activated blood coagulation factor X inhibitor.
                            本发明提供了一种公式(I)的紧凑
呋喃化合物:其中,环X为苯、
吡啶或类似物;Y为可选取代的
氨基、可选取代的环烷基、可选取代的芳基、可选取代的饱和杂环基、可选取代的不饱和杂环基;A为单键、较低的烷基、较低的烯基亚甲基、较低的烯基亚乙基或氧原子;R3为氢或类似物;R4为氢或类似物,或其药学上可接受的盐,其作为药物特别是作为活化的血凝因子X
抑制剂非常有用。