Using CC(C)(C)OC(=O)Cn1cc(C(N)=O)c2cc(O)ccc21, O=C([O-])[O-] to produce COc1ccc2c(c1)c(C(N)=O)cn2CC(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.