Using O, CCCC(=O)Nc1cc(NC(=O)CCC)c2ccc(C)nc2c1OC(=O)CCC to produce CCCC(=O)NC1=CC(=O)c2ccc(C)nc2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.