Using COc1ccc2c(Oc3ccc(Br)cc3)csc2c1, C=CC(=O)OC to produce COC(=O)/C=C/c1ccc(Oc2csc3cc(OC)ccc23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.