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 and is light-emitting.
user
c1ccc2cc(-c3ccc4cc(-c5cncc(-c6ccc7c8c(cccc68)-c6c-7ccc7ccccc67)c5)ccc4c3)ccc2c1
assistant