Using CN(C(=O)OCc1ccccc1)n1c(C(=O)O)c(-c2ccccc2)c2cc(Cl)ccc2c1=O, CC(C)(C)OC(=O)NCCCO to produce CN(C(=O)OCc1ccccc1)n1c(C(=O)OCCCNC(=O)OC(C)(C)C)c(-c2ccccc2)c2cc(Cl)ccc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.