Using CCOC(=O)C=C1CCN(C(=O)OC(C)(C)C)CC1, C[S+](C)(C)=O to produce CCOC(=O)C1CC12CCN(C(=O)OC(C)(C)C)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.