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 device and is electroluminescent.
user
O=C1NC(O)Nc2ccc(-n3c4ccccc4c4cc(-c5ccccc5)ccc43)cc21
assistant