Using CN1CCCC1=O, COC(=O)c1sc2c(c1N)c1ccccc1c(=O)n2-c1ccccc1C to produce COC(=O)c1sc2c(c1N=C1CCCN1C)c1ccccc1c(=O)n2-c1ccccc1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.