You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is light-emitting.
user
N#Cc1ccc2c(c1)c1c3ccc4c(c3ccc1n2-c1ncc(-c2ccccc2)cn1)c1cc(C#N)ccc1n4-c1nc(-c2ccccc2)nc(-c2ccccc2)n1
assistant