Using COC(=O)N1CCN(c2ccc3c(n2)OCCN(C(=O)OC(C)(C)C)C3)CC1 to produce COC(=O)N1CCN(c2ccc3c(n2)OCCNC3)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.