You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: It belongs to the organic light-emitting device class of molecules.
user
c1ccc(-c2ccc(-c3cc(-c4ccc(-c5ccccc5)cc4)nc(-c4ccccc4-c4ccc5c(c4)Oc4c(ccc6c4-c4ccccc4C6(c4ccccc4)c4ccccc4)O5)c3)cc2)cc1
assistant