Using CCOC(=O)C(OC(C)C)C(O)c1ccc(OCCc2nc(C(C)(C)C)oc2C)c2ccsc12 to produce CCOC(=O)C(Cc1ccc(OCCc2nc(C(C)(C)C)oc2C)c2ccsc12)OC(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.