Using CNOC, CC(C)(C)OC(=O)N1CCc2sc(C(=O)O)cc2C1 to produce CON(C)C(=O)c1cc2c(s1)CCN(C(=O)OC(C)(C)C)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.