Using CCOC(OCC)c1cccc2c1Sc1ccccc1N2C, O=CN1CCCCC1 to produce CCOC(OCC)c1cccc2c1Sc1c(C=O)cccc1N2C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.