You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): The molecule is a factor xa inhibitor and is anti coagulant.
user
Nc1ncnc2cc(CN3CCN(Cc4ccc(-c5ccc(Br)s5)s4)CC3=O)ccc12
assistant