Using CC1CCCCN1CC#Cc1cnc2c(ccn2COCC[Si](C)(C)C)n1 to produce CC1CCCCN1c1ccc2cnc3c(ccn3COCC[Si](C)(C)C)n12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.