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 electroluminescent device and belongs to the electroluminescent class of molecules. Please write the SMILES representation of it.
user
Cc1cc(-c2ccccc2)nc2c1ccc1ccc(-c3cccc(-c4ccc(-c5nc(-c6ccccc6)cc(-c6ccc(-c7ccccc7)cc6)n5)cc4)c3)nc12
assistant