This invention relates to tricyclic compounds having spiro union
represented by the following formula (I) or its salt which is useful as a
drug, and in particular, as an inhibitor for activated blood coagulation
factor X, which can be administered orally and which exhibits strong
anticoagulation action. 1
The invention also relates to a pharmacophore which was derived from the
compound and is useful in molecular designing of the FXa inhibitor.
