Using CCOC(=O)CBr, Oc1c2c3c(ccnc3c3ccccc13)CCC2 to produce CCOC(=O)COc1c2c3c(ccnc3c3ccccc13)CCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.