Using C=C(OCC)[Sn](CCCC)(CCCC)CCCC, COc1nc(Br)ccc1-n1cnc(C)c1 to produce C=C(OCC)c1ccc(-n2cnc(C)c2)c(OC)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.