Using OCCBr, COCc1nn(C2CCNCC2)cc1-c1cnc(N)c(-c2nc3ccccc3o2)c1 to produce COCc1nn(C2CCN(CCO)CC2)cc1-c1cnc(N)c(-c2nc3ccccc3o2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.