Using CCOC(=O)CCc1ncc2c(=O)[nH]c3cc(CC)ccc3n12 to produce CCc1ccc2c(c1)[nH]c(=O)c1cnc(CCC(=O)O)n12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.