Using CC(C)(C)[Si](C)(C)OCCCBr, CCC(=O)c1c(O)cc(C)oc1=O to produce CCC(=O)c1c(O)cc(CCCCO[Si](C)(C)C(C)(C)C)oc1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.