Using CCCCCCCCCCCCCCCC(=O)N1CCC(CCON2C(=O)c3ccccc3C2=O)CC1 to produce CCCCCCCCCCCCCCCC(=O)N1CCC(CCON)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.