You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
It has an effect on improved luminous efficiency. Use the above information to create a molecule.
user
c1ccc(-c2nc(-c3ccc4ccc(-c5c6ccccc6cc6sc7ccccc7c56)cc4c3)nc(-c3ccc4c(c3)c3ccccc3n4-c3ccccc3)n2)cc1
assistant