Using O=C(CN1CCc2nc(Br)sc2C1)N1CCN(C2CCC2)CC1, C=C(OCC)[Sn](CCCC)(CCCC)CCCC to produce CC(=O)c1nc2c(s1)CN(CC(=O)N1CCN(C3CCC3)CC1)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.