Using CC1C(=O)NN=C2COc3cc(Br)c(C4CCN(C(=O)OC(C)(C)C)CC4)cc3N21, OB(O)C1CC1 to produce CC1C(=O)NN=C2COc3cc(C4CC4)c(C4CCN(C(=O)OC(C)(C)C)CC4)cc3N21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.