Using COC(OC)c1cn(C(=O)OC(C)(C)C)c(N(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)n1 to produce CC(C)(C)OC(=O)N(C(=O)OC(C)(C)C)c1nc(C=O)c[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.