You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a factor xa inhibitor and is anti coagulant.
user
N=C(N)c1ccc2nc(Cc3nc4ccc(-n5cccn5)cc4[nH]3)[nH]c2c1
assistant