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 that is light-emitting and electroluminescent.
user
c1ccc(-c2cccc(-n3c4ccccc4c4c5ccsc5ccc43)n2)cc1
assistant