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 material and is electroluminescent. Please write the SMILES representation of it.
user
O=c1[nH]c2ccccc2c2cc3c4c5ccccc5ccc4n(-c4nc(-c5ccccc5)c5ccccc5n4)c3cc12
assistant