Using C[Si](C)(C)CCOCn1ccc2c(NC3CCN(Cc4ccccc4)CC3)c(C=O)cnc21 to produce C[Si](C)(C)CCOCn1ccc2c(NC3CCN(Cc4ccccc4)CC3)c(CO)cnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.