You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: It belongs to the organic light-emitting device class of molecules.
user
c1ccc(-c2nc(-c3ccccc3)nc(-c3ccc4sc5cccc(-c6ccc(-c7nc(-c8ccccc8)c8sc9ccccc9c8n7)cc6)c5c4c3)n2)cc1
assistant