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
C1=c2ccccc2=C(c2ccc3c(c2)cc(-c2ccccc2)c2cc(-c4cc5ccccc5cc4-c4ccccc4)ccc23)NC1
assistant