Using CN1C(=O)C(C2=COc3ccccc3O2)=C(c2cn(C(=O)OC(C)(C)C)c3ccccc23)C1=O to produce Cn1c(=O)c2c3oc4ccccc4oc3c3c(c4ccccc4n3C(=O)OC(C)(C)C)c2c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.