Using Cc1c(Nc2ccc(Br)cc2F)c(C(=O)NCCC#N)cn(C)c1=O, C[Si](C)(C)N=[N+]=[N-] to produce Cc1c(Nc2ccc(Br)cc2F)c(-c2nnnn2CCC#N)cn(C)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.