Using COC1(OC)C=CC(=O)C=C1NC(=O)OC(C)(C)C, OO to produce COC1(OC)C(NC(=O)OC(C)(C)C)=CC(=O)C2OC21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.