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
CC1(C)c2ccccc2-c2cc(-c3c4ccccc4c(-c4cc5c6ccccc6sc5c5c4sc4c6ccccc6ccc45)c4ccccc34)ccc21
assistant