Using CCOC(=O)CC(CC=CC(=O)CCc1ccc2c(n1)NCCC2)c1cnc(C)nc1 to produce CCOC(=O)CC(CCCC(=O)CCc1ccc2c(n1)NCCC2)c1cnc(C)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.