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
c1ccc(-c2cc(-c3ccccc3)cc(-c3nc(-c4ccccc4)nc(-c4ccc(-c5cccc6c5nc(-c5ccccc5)c5cccc(-c7ccccc7)c56)cc4)n3)c2)cc1
assistant