Using Cn1cc(-c2cc3nc(NN)cnc3n2COCC[Si](C)(C)C)cn1, CC=O to produce Cc1nnc2cnc3c(cc(-c4cnn(C)c4)n3COCC[Si](C)(C)C)n12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.