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: The molecule is a phosphorescent emitter and belongs to the organic electroluminescent device class of molecules; it is electroluminescent and phosphorescent.
user
CC(C)(C)c1ccc(-c2nc(-c3ccc(C(C)(C)C)cc3)nc(-c3cccc(-c4nccc5ccccc45)c3)n2)cc1
assistant