Using COc1cc(Br)c2ccc(=O)n(CCN3CCC(N(Cc4ccc5c(c4)OCCO5)C(=O)OC(C)(C)C)CC3)c2c1, C=CC(=O)OCC to produce CCOC(=O)/C=C/c1cc(OC)cc2c1ccc(=O)n2CCN1CCC(N(Cc2ccc3c(c2)OCCO3)C(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.