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: It belongs to the light-emitting class of molecules.
user
C1=CC(c2nc(-c3ccc(-c4c5ccccc5nc5ccccc45)cc3)nc3c(-c4ccc5ccc6cccc7ccc4c5c67)cc(C4=CC=c5ccc6cccc7c6c5C4CC=7)cc23)CC=C1c1c2ccccc2nc2ccccc12
assistant