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 light-emitting.
user
CC1(C)c2cc(-c3ccc(-c4ccccc4)cc3)ccc2-c2ccc(-n3c4ccc(-c5ccc(-c6cc7ccccc7c7ccccc67)cc5)cc4c4cc(-c5ccc(-c6cc7ccccc7c7ccccc67)cc5)ccc43)cc21
assistant