You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: The molecule is a organic electroluminescent element and belongs to the organic electroluminescent material class of molecules; it is electroluminescent and organic electroluminescent. Please represent the molecule in SMILES.
user
c1ccc(Nc2ccc3c(Nc4ccccc4)cccc3c2)cc1
assistant