Using CC(C)(C)[Si](C)(C)OCCC[C@H](Oc1ncnc2c1cnn2-c1ncccc1Cl)C(=O)Nc1ccc(Cl)cn1 to produce O=C(Nc1ccc(Cl)cn1)[C@H](CCCO)Oc1ncnc2c1cnn2-c1ncccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.