Using COC(=O)c1c(C(=O)OC)c2n(c1CCN1C(=O)c3ccccc3C1=O)CC(C)(C)C2 to produce COC(=O)c1c2c(n3c1CC(C)(C)C3)CCNC2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.