Using CCCC[Sn](/C=C\OCC)(CCCC)CCCC, CCc1nn(Cc2cccc(C)n2)c2cccc(NC(=O)c3cnc4cc(Br)ccn34)c12 to produce CCO/C=C\c1ccn2c(C(=O)Nc3cccc4c3c(CC)nn4Cc3cccc(C)n3)cnc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.