Using C=C(C(=O)OCC)c1c(OCOC)cccc1OCOC, C[S+](C)(C)=O to produce CCOC(=O)C1(c2c(OCOC)cccc2OCOC)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.