Using COC(=O)C1CN(C2CCN(C(=O)OC(C)(C)C)CC2)C(=O)N1C to produce CN1C(=O)N(C2CCN(C(=O)OC(C)(C)C)CC2)CC1C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.