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 light-emitting device.
user
Fc1ccc2cc3cc(-c4ccc(-c5nc(-c6ccccc6)nc(-c6ccccc6)n5)cc4)c4cccnc4c3nc2c1
assistant