You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a organic electroluminescent device and is electroluminescent.
user
CC1(C)CC=C(c2ccc(-c3ccccc3-c3cc(-c4ccccc4-c4ccc(C5=CCC(C)(C)C5)nc4)cc(-c4ccccc4-c4ccc(C5=CCC(C)(C)C5)nc4)c3)cn2)C1
assistant