Using CCc1nc2c(N)nc3cc(O)ccc3c2s1, Cc1n[nH]c(C)c1CCBr to produce CCc1nc2c(N)nc3cc(OCCc4c(C)n[nH]c4C)ccc3c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.