Using CC(C)(C)OC(=O)N1CC2CCN(C(=O)OCC3c4ccccc4-c4ccccc43)C2C1 to produce O=C(OCC1c2ccccc2-c2ccccc21)N1CCC2CNCC21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.