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 a electroluminescent member of the light-emitting class.
user
O=S1(=O)c2ccccc2-c2cc(-c3ccc4oc5ccccc5c4c3)ccc21
assistant