Using COC(=O)c1cn([C@H]2CC[C@@H](NC(=O)OC(C)(C)C)CC2)nn1 to produce COC(=O)c1cn([C@H]2CC[C@@H](N)CC2)nn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.