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 light-emitting device.
user
c1cncc(-c2cccc(-c3ccc4c(c3)Oc3ccccc3C43c4ccccc4Oc4cc(-n5c6ccccc6c6ccccc65)ccc43)c2)c1
assistant