Using Oc1cc(-c2ccccc2)nc2c(Br)cccc12, CCCCC([SnH3])=C(CCCC)CCCC to produce C=Cc1cccc2c(O)cc(-c3ccccc3)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.