Using O=C1CCCCC1, Brc1ccc2[nH]cc(CCN3CCCC3)c2c1 to produce OC1(c2ccc3[nH]cc(CCN4CCCC4)c3c2)CCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.