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 optoelectronic and belongs to the organic optoelectronic device class of molecules, with the characteristic of being light-emitting.
user
c1ccc(-c2cccc(-c3cccc(-c4cccc(-c5cc(-c6ccccc6)cc(-c6cc(-c7cccnc7)cc(-c7ccccn7)c6)c5)c4)c3)c2)cc1
assistant