Using CN1CCN(c2ccc(C34CC5CC(C3)C(NC(=O)OC(C)(C)C)(C5)C4)cc2)C1=O to produce CN1CCN(c2ccc(C34CC5CC(C3)C(N)(C5)C4)cc2)C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.