Using CC1(C)CNc2cc(Nc3ncnc4c3CN(c3ncccc3Cl)CC4)ccc21, CN(C)C=O to produce CN1CC(C)(C)c2ccc(Nc3ncnc4c3CN(c3ncccc3Cl)CC4)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.