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 immunomodulator and a autoimmune treatment, belonging to the s1p1 agonist class of molecules.
user
COC(=O)C1(C)COC(=O)N1
assistant