Using COC(=O)c1c(N)cccc1S(=O)(=O)NC(C)(C)C, CC(C)=O to produce COC(=O)c1c(NC(C)C)cccc1S(=O)(=O)NC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.