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 and is organic light-emitting. Please represent the molecule in SMILES.
user
c1ccc(-c2nc(-c3ccc4oc5ccccc5c4c3)nc(-c3cccc4oc5cccc(-c6nc7ccccc7s6)c5c34)n2)cc1
assistant