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 compound, high luminous efficiency, and electroluminescent compound.
user
CC1(C)c2ccccc2-c2cccc(-c3ccc(-c4cc(-c5ccc(-c6ccccc6)cc5)nc(-c5cccc6c5oc5ccccc56)n4)cc3)c21
assistant