Using CCCC[C@H](NC(=O)C1CCC(CNC(=O)OCc2ccccc2)CC1)C(=O)OC to produce CCCC[C@H](NC(=O)C1CCC(CN)CC1)C(=O)OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.