You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is a organic light-emitting device that has an effect on low driving voltage. Please write the SMILES representation of it.
user
CC1(C)c2ccccc2-c2ccc(-c3nnc(Cl)c4ccccc34)cc21
assistant