You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: The molecule is a organic electroluminescent element and belongs to the electroluminescent class of molecules.
user
Cc1cc(-c2ccc(N(c3ccc(-c4cccc5ccccc45)cc3)c3c(C)cccc3C)c(C)c2)ccc1N(c1ccc(-c2cccc3ccccc23)cc1)c1c(C)cccc1C
assistant