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 electroluminescent, electronic device, organic electroluminescent device, and phosphorescent classes of molecules.
user
CC1(C)CC(C)(C)c2cc(-c3ncc(-c4nc(-c5ccccc5)nc(-n5c6ccccc6c6ccccc65)n4)cc3C#N)ccc21
assistant