Using CCCCc1nc(Cl)c(C=O)n1Cc1ccc(S(N)(=O)=O)cc1, CC(C)(C)OC(=O)NCC(=O)O to produce CCCCc1nc(Cl)c(C=O)n1Cc1ccc(S(=O)(=O)NC(=O)CNC(=O)OC(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.