Using COC(=O)CNCCNC(=O)OC(C)(C)C, Cc1ccnc2[nH]c(=O)c(CC(=O)O)cc12 to produce COC(=O)CN(CCNC(=O)OC(C)(C)C)C(=O)Cc1cc2c(C)ccnc2[nH]c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.