Using COC(=O)c1ccccc1CN1CN(c2ccccc2)C2(CCN(C(=O)OC(C)(C)C)CC2)C1=O to produce COC(=O)c1ccccc1CN1CN(c2ccccc2)C2(CCNCC2)C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.