Using CC(=O)Nc1cc([Sn](C)(C)C)ccn1, C=CCn1ccnc1-c1sc(Br)nc1Br to produce C=CCn1ccnc1-c1sc(-c2ccnc(NC(C)=O)c2)nc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.