Using O=C(O)Cc1ccc(CC(=O)O)cc1, CCCCCNc1nc(N)nc(C)c1CCCN to produce CCCCCNc1nc(N)nc(C)c1CCCNC(=O)Cc1ccc(CC(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.