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 a phosphorescent and is light-emitting.
user
c1cc(-c2cccc(-c3cccc4c3sc3ccccc34)c2)cc(-c2cc(-c3cccc(-c4cccc(-c5cccc6c5sc5ccccc56)c4)c3)ncn2)c1
assistant