Using CCOC(=O)c1sc(N2CC(NC(=O)OC(C)(C)C)C2)nc1C(C)C to produce CCOC(=O)c1sc(N2CC(N)C2)nc1C(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.