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: It belongs to the high luminous efficiency, organic electroluminescent device, and electroluminescent classes of molecules and has an effect on both luminous efficiency and low driving voltage.
user
c1ccc(-c2nc(-n3c4cccc5c4c4c6c(cc7ccccc7c6ccc43)-c3ccccc3-5)nc3ccccc23)cc1
assistant