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 and organic electroluminescent device, electroluminescent, and has an effect on low driving voltage.
user
c1ccc(-c2nc(-c3ccccc3)nc(-c3ccc(-n4c5ccc6ccccc6c5c5c6ccccc6c(-c6ccccc6)cc54)cc3)n2)cc1
assistant