Using CCOC(=O)CC1CCC(c2nc3c(-c4cnc5ccccc5c4)cnn3c(N(COCC[Si](C)(C)C)COCC[Si](C)(C)C)c2Br)CC1, CCCC[Sn](C#N)(CCCC)CCCC to produce N#Cc1c(C2CCC(CC(=O)O)CC2)nc2c(-c3cnc4ccccc4c3)cnn2c1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.