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 a plasma kallikrein inhibitor.
user
Cc1cc(N)nc(C)c1CNc1ncnc2nc(Cc3ccc4ncc(C(F)(F)F)cc4c3)[nH]c12
assistant