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 high refractive index class of molecules.
user
O=C(Oc1ccccc1)c1ccc2cc3ccccc3cc2c1C(=O)Oc1ccccc1
assistant