You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: The molecule is a organic light-emitting device that has an effect on light emission.
user
CC1(C)c2ccccc2-c2cc(-c3cccc4ccccc34)c(-c3ccc(-c4cccc(-c5nc(-c6ccccc6)nc(-c6ccc7ccccc7c6)n5)c4)cc3)cc21
assistant