You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is a organic electroluminescent device and is electroluminescent. Please write the SMILES representation of it.
user
c1ccc(-c2cn3c(n2)sc2cccc(-c4ccc5c(c4)c4ccccc4n5-c4ccccc4)c23)cc1
assistant