Using CCOC(=O)CC1CCC(N(CCSC)C(=O)OC(C)(C)C)CC1 to produce CSCCN(C(=O)OC(C)(C)C)C1CCC(CC(=O)O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.