Using CCCCc1nc2c(N)nc3cc(Br)ccc3c2n1CC(C)C, C=CC(=O)OC to produce CCCCc1nc2c(N)nc3cc(/C=C/C(=O)OC)ccc3c2n1CC(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.