Using CC(C)(C)OC(=O)c1ccc(C=O)s1, CCOP(=O)(OCC)C(C)C(=O)OC to produce COC(=O)/C(C)=C/c1ccc(C(=O)OC(C)(C)C)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.