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 light-emitting that is both organic electroluminescent and electroluminescent.
user
CC1(C)c2cc(-c3ccc(-c4ccc(-c5nc(-c6ccccc6)nc(-c6ccc(-c7cccnc7)cc6)n5)cc4)cc3)ccc2-c2c1ccc1ccccc21
assistant