Using C[Si](C)(C)OCCOCCl, COc1ccc(N(C(=O)CN2C=CN(c3ccccc3)C(=O)CC2=O)C(C)C)cc1 to produce COc1ccc(N(C(=O)CN2C=CN(c3ccccc3)C(=O)C(=COCCO[Si](C)(C)C)C2=O)C(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.