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
C=CC(=O)OCC1(C)CC2CC(C1)C1CCCC21
assistant