Using COC(=O)c1ncn[nH]1, Cc1cc(-c2nnn(C)n2)cc(C)c1OCCCBr to produce COC(=O)c1ncn(CCCOc2c(C)cc(-c3nnn(C)n3)cc2C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.