Using CC(C)n1ncc(CC2(N=C=O)CCN(C(=O)OC(C)(C)C)CC2)c1Br to produce CC(C)(C)OC(=O)N1CCC2(CC1)CC1CNNC1=CN2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.