You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule is a organic light-emitting device. Please represent the molecule in SMILES.
user
c1ccc(-c2cncc(-c3cccc(-c4cccc5c4-c4ccccc4C54c5ccccc5-c5c(-c6cccc(-c7cncc(-c8ccccc8)n7)c6)cccc54)c3)n2)cc1
assistant