Using CC1C(=O)NN=C2COc3cc(Br)c(C4CCN(C(=O)OC(C)(C)C)CC4)cc3N21, CB1OB(C)OB(C)O1 to produce Cc1cc2c(cc1C1CCN(C(=O)OC(C)(C)C)CC1)N1C(=NNC(=O)C1C)CO2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.