Using CCN(CC)CCCBr, CC1(C)N=CC2=C3N=C(c4ccccc4)N=C3C(=O)CC2C1=O to produce CCN(CC)CCCC1C(=O)C2=NC(c3ccccc3)=NC2=C2C=NC(C)(C)C(=O)C21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.