Using CN1CCN([C@H]2C[C@H]3[C@@H]4CC[C@H]5C[C@@H]6O[C@@H]6C[C@]5(C)[C@H]4CC[C@]3(C)C2=O)CC1 to produce CN1CCN([C@H]2C[C@H]3[C@@H]4CC[C@H]5C[C@@H]6O[C@@H]6C[C@]5(C)[C@H]4CC[C@]3(C)[C@H]2O)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.