Using COCCOc1nc(N)c2nc(OC)[nH]c2n1, BrCC1CCOCC1 to produce COCCOc1nc(N)c2nc(OC)n(CC3CCOCC3)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.