Using Cc1ccc(C(=O)N2CC(C(=O)N3CCCNCC3)C2)cn1, CC(C)=O to produce Cc1ccc(C(=O)N2CC(C(=O)N3CCCN(C(C)C)CC3)C2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.