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: It belongs to the organic light-emitting device class of molecules. Please represent the molecule in SMILES.
user
c1ccc2cc(-c3nc(-c4ccc5ccccc5c4)nc(-c4ccc(-n5c6cc7ccccc7cc6c6c7ccccc7ccc65)cc4-c4cccc5sc6ccccc6c45)n3)ccc2c1
assistant