Using C=C(C)C(C(=O)OC)N1C(=O)C(NC(=O)COc2ccccc2)C1SNc1ccccc1, CCOCC to produce COCC1(C)S[C@@H]2C(NC(=O)COc3ccccc3)C(=O)N2C1C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.