You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule based on this description: It belongs to the organic light-emitting device class of molecules.
user
c1ccc(-c2cccc(-c3nc(-c4cccc5c4sc4ccccc45)cc(-n4c5ccccc5c5c6sc7ccccc7c6ccc54)n3)c2)cc1
assistant