Using CC(C)(O)COc1ccc2c(c1Br)[C@]1(COC(N)=N1)c1cc(-c3cccnc3)ccc1O2, C[Sn](C)(C)C to produce Cc1c(OCC(C)(C)O)ccc2c1[C@]1(COC(N)=N1)c1cc(-c3cccnc3)ccc1O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.