You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Conceptualize a molecule that meets the specified attribute(s): The molecule is a organic electroluminescent device and belongs to the phosphorescent emitter, phosphorescent, and electroluminescent classes of molecules.
user
Cc1ccc(-c2cccc(-c3nccc4ccccc34)c2)cc1-c1cccc(C(C)(C)c2ccccc2C)c1C
assistant