Using O=C(O)C=Cc1ccco1, CCCN(CCC)C(=O)C(N)CCC(=O)NC to produce CCCN(CCC)C(=O)C(CCC(=O)NC)NC(=O)C=Cc1ccco1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.