Using CC(C)(C)OC(=O)NC1CC(=O)C1, COC(=O)CP(=O)(OC)OC to produce COC(=O)C=C1CC(NC(=O)OC(C)(C)C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.