You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: The molecule is a organic electroluminescent element and is electroluminescent.
user
N=C(N=C(Nn1c2ccc(-c3ccccc3)cc2c2cc(-c3ccc4c(c3)c3cc(-c5ccccc5)ccc3n4-c3ccccc3)ccc21)C1=CCCC=C1)c1ccc2c3ccccc3c3ccccc3c2c1
assistant