Using COC[C@@H]1CCN1c1c2c(nc3ccnn13)CCN(C(=O)OC(C)(C)C)CC2 to produce COC[C@@H]1CCN1c1c2c(nc3ccnn13)CCNCC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.