Using CCC(=O)C1C(=O)CC2(CCc3ccccc32)CC1=O, CCON to produce CCON=C(CC)C1C(=O)CC2(CCc3ccccc32)CC1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.