Using CCOC(=O)c1cn(C2CC2)c2c(F)c(F)c(F)c(Br)c2c1=O, CCCCC([SnH3])=C(CCCC)CCCC to produce C=Cc1c(F)c(F)c(F)c2c1c(=O)c(C(=O)OCC)cn2C1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.