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 light-emitting device. Please write the SMILES representation of it.
user
c1ccc(-c2c3ccccc3c(-c3ccc(-c4ccc5c(ccc6c7ccc8ccccc8c7sc56)c4)cc3)c3ccccc23)cc1
assistant