Using COc1cc(Cn2c3ccccc3c3c(O)cccc32)ccc1OCc1nc(-c2ccccc2)oc1C, CCOC(=O)[C@H](Br)CC to produce CCOC(=O)[C@H](CC)Oc1cccc2c1c1ccccc1n2Cc1ccc(OCc2nc(-c3ccccc3)oc2C)c(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.