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(-c2c3ccccc3c(-c3ccc4cc(-c5cc6sc7ccccc7c6c6c5sc5c7ccccc7ccc56)ccc4c3)c3ccccc23)cc1
assistant