Using CCN=C=NCCCN(C)C, CC(C)(C)OC(=O)N(CCC(=O)O)C1CCN(C(=O)OCc2ccccc2)CC1 to produce CC(C)(C)OC(=O)N(CCC(N)=O)C1CCN(C(=O)OCc2ccccc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.