You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: The molecule is both a factor xia inhibitor and a plasma kallikrein inhibitor.
user
C=CCC(NC(=O)OC(C)(C)C)c1cc(F)cc(Br)c1
assistant