You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: The molecule is phosphorescent.
user
Fc1cccc(-c2ccc(-c3cccc(-c4ccnc(-n5c6ccccc6c6cc(-c7ccc8c9ccccc9n(-c9ccccc9)c8c7)ccc65)n4)c3)cc2)c1
assistant