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: The molecule is a organic light-emitting device.
user
Cc1ccc(-c2ccc3c(c2)C2(c4ccccc4Oc4ccccc42)c2cc(-c4ccc(-c5nc(-n6c7ccccc7c7ccccc76)nc6ccccc56)cc4)ccc2-3)cc1
assistant