Using COCCO[Si](C)(C)C(C)(C)C, CC(C)COC(=O)C1(C)CCC(=O)CC1 to produce COCCOC1CCC(C)(C(=O)OCC(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.