Using CC(=O)Nc1ccc(C(=O)N2CC3CC(CN(Cc4ccccc4)C3)C2)cc1 to produce CC(=O)Nc1ccc(C(=O)N2CC3CNCC(C3)C2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.