Using CC1OC(C)C2N(C1=O)c1ccc(NC(=O)OC(C)(C)C)cc1CC21C(=O)NC(=O)NC1=O to produce CC1OC(C)C2N(C1=O)c1ccc(N)cc1CC21C(=O)NC(=O)NC1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.