Using C1COCCN1, Cc1onc(-c2ccccc2)c1-c1nnc(-c2ccc(Br)cn2)o1 to produce Cc1onc(-c2ccccc2)c1-c1nnc(-c2ccc(N3CCOCC3)cn2)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.